This new Web 2.0 app shows promise. Taskbin is a collaboration tool that allows you to share and manage to-do lists among groups. You can flag tasks in order of urgency to prioritize and write notes for yourself or share them with group members.
Unlike other project management tools, TaskBin doesn't force you to enter deadlines. It's a simple list manager that gives an unlimited amount of users a lot of flexibility for getting things done.
Check it out at Taskbin.com