I’ve spent a few nights playing with a new (to me) programming language, Boo. It really feels like the best of C#, Ruby, and Python. If you are interested in writing for the CLI or you are generally interested in programming languages, check out the features page to check out some of the reasons why I’ve been impressed.
If you are interested in trying it out, be sure and grab the new version of SharpDevelop. It’s got built-in support for Boo projects (including Windows Forms editing).