Implement notification for upcoming tasks via a daily fired rake-task.

app/models/task.rb

@@ -22,6 +22,7 @@ class Task < ActiveRecord::Base
 
   named_scope :non_group, :conditions => { :workgroup_id => nil, :done => false }
   named_scope :done, :conditions => {:done => true}, :order => "due_date ASC"
+  named_scope :upcoming, lambda { |*args| {:conditions => ["done = 0 AND due_date = ?", (args.first || 7.days.from_now)]} }
   
   # form will send user in string. responsibilities will added later
   attr_protected :users