Windows Communication Foundation
In between all the Ruby work I do at home my day job still requires me to continue to work on the Windows platform. I've not been following Microsoft's development as closely as I use to, but today I'll be attending a one-day training course on Windows Communication Foundation, which is from what I gather the new Web Services stack replacing WSE.
It should be a fun day (for a geek) and I'm hoping to learn enough to start putting it to use immediately, of note I'm especially interested in the WS-Security parts as that would be probably be most useful.