Professional IronRuby
Our own Aaron Junod (part of the CTDOTNET crew) is teaming up with Rob Bazinet to write 'Professional IronRuby' (for Wrox publishing). This should be a good piece of work.
I have know Aaron for quite a few years and he is one talented developer and this book should be a good one.
Now we should get him to present IronRuby at the Connecticut .NET Developers Group.