I added a blog “ADO.net Data Service reflection class creation in VS2008 SP1 Beta, a breaking change with CTP time” in

http://blogs.msdn.com/xqiu/archive/2008/05/13/ado-net-data-service-reflection-class-creation-in-vs2008-sp1-beta-a-breaking-change-with-ctp-time.aspx

Hope it helps for data service lovers.

Xin, SDET in Web Development Tools