Howard van Rooijen is working on a Scrum methodology for Team Foundation
This looks really exciting. A lot of folks I know are working using Scrum methodologies (including folks here at Microsoft) so it's great to see the work that Howard is doing with Colin Bird, Stuart Preston, Susie Kablean to implement Scrum methodologies using Team System
Full article here.
Howard also has a podcast with a more general primer on Agile and Scrum here - I haven't watched it yet but it sounds really interesting.
UPDATE: Thanks to Buck, I corrected the title which originally said Howard was working on a Scrub methodology....