JVM based languages are the New Black. Jython and JRuby, pnuts, groovy and scala all vie for our collective attention. Perhaps you'd like to make room for another? Clojure is Rich Hickey's relatively new addition to the group. As a lisp variant it brings a functional programming approach, "code as data", macros and introduces a set of concurrency primitives that hold out the promise of finally making it easy for mere mortals to manage shared state in our applications.
Intrigued? If so, you should probably read about it at clojure.org and view Rich Hickey's videos at clojure.blip.tv. If you can't manage that, you can settle for listening to me (Stan Dyck) talk about and demonstrate some of the features of clojure at the next SeaJUG meeting. I will introduce the language syntax and design, talk about clojure IDE support, the clojure approach to functional programming, and show a bunch of demonstrations stolen from all over the Internet for your viewing enjoyment.