Everyone is giving its wish list for WSE 3.0 with WS-Reliable messaging being the foremost requirement so I _wish_ WSE 3.0 would have support for SAML 2.0 & WS-Federation support. Given the extensible nature of WSE its not difficult (technically). Sometime back I had written an implementation of WS-Federation for Plumbwork at GDN (now moved to SourceForge) for my identity management demo at Burton-catalyst, WSE team may take that as a starting point.