WIF Windows Identity Foundation

WIF Federation over TCP
http://marshaledthoughts.com/post/TCP-Federation-with-Windows-Identity-Foundation.aspx

WCF
Bindings
http://msdn.microsoft.com/en-us/library/ff650874.aspx

Identity Developer Training Kit
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=14347

WIF Books
http://blogs.msdn.com/b/vbertocci/archive/2011/01/19/programming-windows-identity-foundation-is-figuratively-on-fire.aspx

WIF Main Microsoft Page
http://msdn.microsoft.com/en-us/security/aa570351

Big Sample like Demo of WIF posibilities
http://www.fabrikamshipping.com/

WIF Workshop 7 WIF and WCF video channel
http://channel9.msdn.com/Shows/Identity/WIF-Workshop-7-WIF-and-WCF
from 50min author talk about two STS, which goes through ActAs, he use fabrikamshipping demo project

Design architecture, model how to Web Application retrive ST from STS
http://msdn.microsoft.com/en-us/library/ee517293.aspx