We just posted the details on the next Web services protocol Workshop. This is an interop workshop for those with WS-Trust and WS-SecureConversation implementations. The Workshop is being hosted by IBM in Austin on October 5th and 6th.
They are really stepping up into the meat of the trust and secconv specs with this one. If things go well, x-platform trusted security will really have turned the corner toward reality.
For more infomation on other Workshops and the Workshop process check out the Workshops page on the MSDN Web Services Developer Center.