TypeScript just release a preview version of 0.9, added generics which is pretty big feature.

Anders Hejlsberg is busy commenting on people's blog
http://journal.stuffwithstuff.com/2013/04/23/playing-with-generics-in-typescript-0.9.0/#comment-874873195
using twitter https://twitter.com/ahejlsberg
even registered on GitHub https://github.com/ahejlsberg

so I guess he is having lots of fun.

and Roslyn of course.