William Bartholomew just published a new book on MSBuild and TFS. There is a great forward by Richard Hundhausen (Famous TFS Author and top MS consultant).  I personally don’t use TFS yet, but I do use MSBuild and plan on using it more extensively for web deployments going forward.  I have not yet read the book, but am anxiously looking forward to.  It is a topic that IMHO has been very under documented.  This should be a big help!