Just in case you haven't seen this yet:
http://www.codethinked.com/category/IronRuby-via-C-Series.aspx
I'm sure it's a handy tutorial for learning Ruby (using IronRuby for .NET) the language if you've already got C#/.NET background. I personally think the DLR will become a huge thing and will help a lot in getting enterprises (like my current employer) to embrace dynamic languages.