A short background reading link list for my CTS404 session at TechEd that I'll do in Room 10 this afternoon (Monday, May 24) at 5:00pm at TechEd San Diego:

Stateless?!
(About the uselessness of the static "statelessness" of a component as an indicator for its scalability)

Dealing with distributed transaction anomalies caused by web service calls from within transactions
(I'll show an updated version of that approach) 

Just in time activation proxy pooling
(Client side "connection pooling" for Enterprise Services)

I am looking forward to the session, because it's another one that challenges established beliefs (such as "stateless"="scalable")