EMC (formerly from Conchango) has recently released a Beta of a new release of their popular SCRUM for Team System.  This Beta is designed to work with TFS 2010 Beta 2.  You can find download details here:

 http://scrumforteamsystem.com/cs/forums/4554/ShowPost.aspx

and I recommend checking out Crispin Parker's blog to learn more:

http://consultingblogs.emc.com/crispinparker/default.aspx

Brian