Interview: Sanjiva Weerawarana on Web Services, REST and Open Source SOA Tools
Watch the full interview (29") for more.
The Next Big Thing
Registry/Repository - RESTful, based on AtomPub, not tied to UDDI legacy.
Identity solution - based on CardSpace, an open (!) technology from Microsoft.
Plus the more "conventional" stuff like the app server and the ESB.
Who knows, the Next Big Thing may very well be the WSO2 product suite!
Keep up the good work.