Over the course of writing the book, there were a number of things going on in parallel inside MS, some of which weren't finalized when the book went to press. One of those items was the patterns document that the product group published this month.  I had a chance to sit down with one of it's authors, Bill Barnes, while writing the book, and serve as a reviewer on the initial passes of the doc.

It's an excellent doc and a must read. One thing to note, is that if you look at the chapter on modifying the existing ASP.NET membership controls to support information cards, you'll see that I provide a number of stored procedures to handle additional scenarios mentioned in the doc.

You can get the document here

http://www.identityblog.com/wp-content/resources/information_card_patterns.pdf