Did you know that we have a wiki on Channel9 that is dedicated to MSBuild? This is something new that we have been trying over the past few months. Look here to find information that is posted by everyone in the MSBuild community.
The quickstarts have been updated for beta2 - so try these out and let us know what you think. Also, don't be shy about requesting what you'd like to see on the site and in the product, by editing the Community Wishlist
faisal