Adding support for keeping points synked if you have a custom field named "Points" on the issues.

README.rdoc

@@ -12,6 +12,10 @@ A scrum/agile tool. Useful for product planning, sprint planning, and daily stan
 
 You will need to enable the Backlogs module per project via Settings > Modules. Also, make check that the right roles have permission to use the module by going to Administration > Roles and Permissions > Permissions Report.
 
+= Points sync
+
+If you have a custom field called "Points" on the issues, that value will be kept in sync with the corresponding Backlog issue points.
+
 = Chart Data Generator
 
 You may schedule a cron job to run the rake task named <tt>redmine:backlogs_plugin:generate_chart_data</tt>. I recommend you run it a few minutes after midnight to ensure that your backlogs have data everyday even when no user views the charts.

app/models/item.rb

@@ -4,6 +4,8 @@ class Item < ActiveRecord::Base
   belongs_to   :backlog
   acts_as_list :scope => 'items.backlog_id=#{backlog_id} AND items.parent_id=#{parent_id}'
   acts_as_tree :order => "items.position ASC, created_at ASC"
+  
+  after_save :update_issue_points
 
   def append_comment(user, comment)
     journal = issue.init_journal(User.current, @notes)
@@ -99,14 +101,19 @@ class Item < ActiveRecord::Base
     find_by_issue_id(issue.id).destroy
   end
 
+  def update_issue_points
+    Item.custom_points(issue).update_attribute(:value, points) if Item.custom_points(issue)
+  end
+
   def self.update_from_issue(issue)
     backlog         = Backlog.find_by_version_id(issue.fixed_version_id)
     item            = find_by_issue_id(issue.id) || Item.new()
     item.issue_id   = issue.id
     item.backlog_id = (backlog.nil? ? 0 : backlog.id)
-    item.save 
+    item.points     = custom_points(issue).value if custom_points(issue)
-  end  
+    item.save
-  
+  end
+    
   def determine_new_position(params)
     if params[:prev]=="" || params[:prev].nil?
       1
@@ -120,4 +127,10 @@ class Item < ActiveRecord::Base
     insert_at determine_new_position(params)
   end
   
+  private
+  
+  def self.custom_points(issue)
+    issue.custom_values.to_a.find { |value| value.custom_field.name == "Points" }
+  end
+  
 end