Index: app/helpers/issues_helper.rb
===================================================================
--- app/helpers/issues_helper.rb	(revision 3544)
+++ app/helpers/issues_helper.rb	(working copy)
@@ -43,11 +43,14 @@
     n = 0
     ordered_values.compact.each do |value|
       s << "</tr>\n<tr>\n" if n > 0 && (n % 2) == 0
-      s << "\t<th>#{ h(value.custom_field.name) }:</th><td>#{ simple_format_without_paragraph(h(show_value(value))) }</td>\n"
+      s << "\t<th>#{ h(value.custom_field.name) }:</th><td>"
+      s << value.custom_field.field_format == "group_list" ? show_value_on_view(value) : simple_format_without_paragraph(h(show_value(value)))
+      s << "</td>\n"
       n += 1
     end
     s << "</tr>\n"
-    s
+
+    return s
   end
   
   def sidebar_queries
@@ -115,11 +118,20 @@
     
     unless no_html
       label = content_tag('strong', label)
-      old_value = content_tag("i", h(old_value)) if detail.old_value
+
+      if !custom_field.nil? && custom_field.field_format == 'group_list'
+        old_value = content_tag("i", old_value) if detail.old_value
+      else
+        old_value = content_tag("i", h(old_value)) if detail.old_value
+      end
+
       old_value = content_tag("strike", old_value) if detail.old_value and (!detail.value or detail.value.empty?)
+
       if detail.property == 'attachment' && !value.blank? && a = Attachment.find_by_id(detail.prop_key)
         # Link to the attachment if it has not been removed
         value = link_to_attachment(a)
+      elsif !custom_field.nil? && custom_field.field_format == 'group_list'
+        value = content_tag("i", value) if value
       else
         value = content_tag("i", h(value)) if value
       end
Index: app/helpers/custom_fields_helper.rb
===================================================================
--- app/helpers/custom_fields_helper.rb	(revision 3544)
+++ app/helpers/custom_fields_helper.rb	(working copy)
@@ -49,6 +49,20 @@
                        (custom_field.default_value.blank? ? "<option value=\"\">--- #{l(:actionview_instancetag_blank_option)} ---</option>" : '') : 
                        '<option></option>'
       select_tag(field_name, blank_option + options_for_select(custom_field.possible_values, custom_value.value), :id => field_id)
+
+    when 'group_list'
+      groups = @project.principals
+      groups.delete_if { |group| group.type != 'Group' }
+
+      custom_field.possible_values.clear()
+      groups.each { |group| custom_field.possible_values << group if group.type == 'Group' }
+
+      blank_option = custom_field.is_required? ?
+                        (custom_field.default_value.blank? ? "<option value=\"\">--- #{l(:actionview_instancetag_blank_option)} ---</option>" : '') : 
+                        '<option></option>'
+
+      select_tag(field_name, blank_option + options_for_select(groups.collect { |x| [x.lastname, x.id] }, custom_value.value), :id => field_id)
+
     else
       text_field_tag(field_name, custom_value.value, :id => field_id)
     end
@@ -101,6 +115,8 @@
       begin; format_date(value.to_date); rescue; value end
     when "bool"
       l(value == "1" ? :general_text_Yes : :general_text_No)
+    when 'group_list':
+      link_to_group(Group.find(:first, :conditions => [ 'id = ?', value]))
     else
       value
     end
@@ -110,4 +126,22 @@
   def custom_field_formats_for_select
     CustomField::FIELD_FORMATS.sort {|a,b| a[1][:order]<=>b[1][:order]}.collect { |k| [ l(k[1][:name]), k[0] ] }
   end
+
+  # Return a string used to display a custom value on the issues view
+  def format_value_for_view(value, field_format)
+    return "-" unless value && !value.empty?
+
+    case field_format
+      when 'group_list'
+        link_to_group(Group.find(:first, :conditions => [ 'id = ?', value]))
+      else
+        format_value(value, field_format)
+    end
+  end
+
+  def show_value_on_view(custom_value)
+    return "" unless custom_value
+    format_value_for_view(custom_value.value, custom_value.custom_field.field_format)
+  end
+
 end
Index: app/helpers/application_helper.rb
===================================================================
--- app/helpers/application_helper.rb	(revision 3544)
+++ app/helpers/application_helper.rb	(working copy)
@@ -58,6 +58,15 @@
     end
   end
 
+  # Displays a link to the group
+  def link_to_group(group, options={})
+    if group.is_a?(Group)
+      link_to group.lastname, :controller => 'groups', :action => 'show', :id => group
+    else
+      h(group.to_s)
+    end
+  end
+
   # Displays a link to +issue+ with its subject.
   # Examples:
   # 
Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb	(revision 3544)
+++ app/models/issue.rb	(working copy)
@@ -328,6 +328,9 @@
     # Author and assignee are always notified unless they have been locked
     notified << author if author && author.active?
     notified << assigned_to if assigned_to && assigned_to.active?
+
+    ## EEH: TODO: add Group-email addresses here at some point
+
     notified.uniq!
     # Remove users that can not view the issue
     notified.reject! {|user| !visible?(user)}
Index: app/models/custom_field.rb
===================================================================
--- app/models/custom_field.rb	(revision 3544)
+++ app/models/custom_field.rb	(working copy)
@@ -25,8 +25,9 @@
                     "int" => { :name => :label_integer, :order => 3 },
                     "float" => { :name => :label_float, :order => 4 },
                     "list" => { :name => :label_list, :order => 5 },
-			        "date" => { :name => :label_date, :order => 6 },
-			        "bool" => { :name => :label_boolean, :order => 7 }
+                    "date" => { :name => :label_date, :order => 6 },
+                    "bool" => { :name => :label_boolean, :order => 7 },
+                    "group_list" => { :name => :label_group_list, :order => 8 },
   }.freeze
 
   validates_presence_of :name, :field_format
Index: app/views/custom_fields/_form.rhtml
===================================================================
--- app/views/custom_fields/_form.rhtml	(revision 3544)
+++ app/views/custom_fields/_form.rhtml	(working copy)
@@ -20,6 +20,15 @@
       if (p_searchable) Element.show(p_searchable.parentNode);
       Element.show(p_values);
       break;
+
+    case 'group_list':
+      p_default.setAttribute('type','combolist');
+      Element.hide(p_length.parentNode);
+      Element.hide(p_regexp.parentNode);
+      if (p_searchable) Element.show(p_searchable.parentNode);
+      Element.hide(p_values);
+      break;
+
     case "bool":
       p_default.setAttribute('type','checkbox');
       Element.hide(p_length.parentNode);
Index: app/views/projects/show.rhtml
===================================================================
--- app/views/projects/show.rhtml	(revision 3544)
+++ app/views/projects/show.rhtml	(working copy)
@@ -16,7 +16,7 @@
   <% end %>
 	<% @project.custom_values.each do |custom_value| %>
 	<% if !custom_value.value.blank? %>
-	   <li><%= custom_value.custom_field.name%>: <%=h show_value(custom_value) %></li>
+       <li><%= custom_value.custom_field.name%>: <%= custom_value.custom_field.field_format == "group_list" ?  h(show_value_on_view(custom_value)) : h(show_value(custom_value)) %></li>
 	<% end %>
 	<% end %>
 	</ul>	
Index: config/locales/en.yml
===================================================================
--- config/locales/en.yml	(revision 3544)
+++ config/locales/en.yml	(working copy)
@@ -475,6 +475,10 @@
   label_and_its_subprojects: "{{value}} and its subprojects"
   label_min_max_length: Min - Max length
   label_list: List
+
+  ## EEH: TODO: Translation
+  label_group_list: Group List
+
   label_date: Date
   label_integer: Integer
   label_float: Float