Artificial Intelligence, Software Architecture, Cloud
I still didn't read the reports about it, but this looks like it was a great event. Just look at the agenda: C#, Volta, IronRuby and Ruby.NET, the DLR,, F#, Mono, Poweshell, PHP, etc. Who said language innovation is over?
Ted Neward has a good overview of the sessions: day 1, day 2, day 3.