Just placed my order for the second edition of Framework Design Guidelines by Kryzstof Cwalina and Brad Abrams at Fishpond. They've got a good pre-order special of $59.42 (might be today only).

I'm really looking forward to reading all of the new guidelines in book format, although Kryzstof has been reasonably open by publishing them on his blog as they were developed, and has released a Framework Design Guidelines Digest with some of the useful nuggets from the book.