Ok, so I've just posted my current non-technical reading list so now here's my techinical currently-reading list:

Programming Ruby: The Pragmatic Programmers' Guide, Second Edition - Dave Thomas, Chad Fowler and Andy Hunt

I've been playing around with Ruby for quite some time now but I need a good reference book for it.  What other book to read than main source of Ruby knowledge out there!  After the announcement of the DLR (which I've downloaded already), I can't wait to do more of Ruby natively on .NET!

Programming WCF Services - Juval Lowy

Programming WCF Services

Another great master work by Juval.  If you're currently doing WCF (or thinking about it) then you should definitely pick this book up!  That's all I have to say about that...