Picked up the PickAxeBook today.
stevej was right, I am a language nerd.
So, I'm working/playing with Common Lisp, Scheme, Python, Smalltalk, Java (rarely now, though), and E. I've toyed with Rebol (REBOL?), Haskell, Objective-C (wouldn't mind doing more, because I actually know it moderately well, but I was using it for Mac OS X stuff that's currently on hold), and (eek) REALbasic.
Oh, and Self. Just noticed there's a Mac OS environment for it.
More to come...