Dynamic Language Runtime on top of the CLR: This Is BIG
Check this out. Even though that Jim says that it is on the IronPython site, I can't find it, but I am still loving it. Making the CLR more friendly to dynamic languages is a Good Thing in general, but the thing that excites me is the possiblity that it can be leveraged from my code as well.
I paid my IL taxes, and while Linq expressions are nice, I would like to get solid support for runtime code generation without having to do it in the assembly level.