pivotal tracker is the best.<p>pivotal tracker site: <a href="http://pivotaltracker.com" rel="nofollow">http://pivotaltracker.com</a><p>my own blog post on initial reaction to using pivotal tracker: <a href="http://proudly.procrasdonate.com/project-management-and-motivation/" rel="nofollow">http://proudly.procrasdonate.com/project-management-and-moti...</a><p>a follow-up post: <a href="http://proudly.procrasdonate.com/retrospective/" rel="nofollow">http://proudly.procrasdonate.com/retrospective/</a>