This article (10 Programming Languages Worth Checking Out) over at H3RALD is very interesting. If you seek out new things to learn, and new computer languages to program in, then this article should pique your interest.
The languages listed are: Haskell, Erlang, Io, PLT Scheme, Clojure, Squeak, OCaml, Factor, Lua, and Scala. There is also a To get you started… section for each language with pertinent links for learning more.
I was surprised to find that at least six of these languages have significantly caught my attention already. I find Lua to be absolutely beautiful and a delight to program in (my PalmPilot has PLua loaded all the time). Squeak is just Smalltalk-80 kept alive – and Smalltalk has been of interest to me ever since I learned of it decades ago. Haskell and Erlang are interesting, too – but I’ve not followed that up with learning yet.
Now Scala and Clojure have my attention. Unfortunately, Clojure almost seems like it takes the simplicity of Common Lisp and trades it in for complexity. I don’t find the “complaints” against Common Lisp to be valid; I’d rather see Common Lisp implemented in Java than a Lisp-derivative.
I expect I’ll be talking more about Scala as time goes on – this language has caught me good.
UNIX Administratosphere 
Though Smalltalk is not that popular these days, there is a new renaissance in Smalltalk development, thanks to Squeak.In the process of my learning I have collected some good sites (more than 200) related to Smalltalk and Squeak (lessons, tutorials and programming). If you are interested take a look at the below link.
200 sites to know about smalltalk programming http://bit.ly/g3iow