There's a discussion here:
http://blogs.msdn.com/cthota/archive...11/351208.aspx
which in turn references the following MP2KMag newsletter:
http://www.mp2kmag.com/update/mappoi...er/2005-01-12/
Directions Magazine also has an article:
http://www.directionsmag.com/article.php?article_id=744
Strangely, a Microsoft page (other than the above blog) doesn't appear in the top 10 results from Google.
Richard