I have been asked a few times about a Team Build 2010 guide.

I have taught on writing one and then I have seen this grate guide written by Ewald Hofman:

http://www.ewaldhofman.nl/post/2010/04/20/Customize-Team-Build-2010-e28093-Part-1-Introduction.aspx

I have only read chapters 2 and 4 but I could see that this is a very serious guide.

Ewald has done a very good job in covering all the important sections of the Team Build 2010, with very good explanations, step by step descriptions and good screenshots.

Have Fun!!!