<p>Does anyone know of shared TODO list plugin for Eclipse that allows users in a a development team to all view and edit the same list of tasks?</p>

Mylyn
can be used to integrate issue tracking systems into the IDE.
It does this by making tasks a first class part of Eclipse, and integrating rich and offline editing for repositories such as Bugzilla, Trac, and JIRA.
If you are not looking for a lightweight solution, then you might give it a try.