At code camp i mentioned build as one of the areas in TeamSystem with the most enhancements was Build- well now there is a new set of documentation for the Team build API to go with it!

http://download.microsoft.com/download/5/f/8/5f872c2e-4221-410b-b86e-4c3cd831b0c4/Team Foundation Build Managed Reference.chm

Make sure and remember to unblock the CHM file if you are running Vista like myself.

Buck also points out same great samples using the build api.