Richard Heyes wrote:
Since noone has mentioned it yet, I'd suggest Brainfuck (http://www.muppetlabs.com/~breadbox/bf/). Very easy to learn (only eight instructions) so you should have something up and running pretty quickly. Notably, it has some of the most elegant code structure I've ever seen.
I know this is a little off topic, but anyone who finds BF interesting might also want to consider one of my personal favorites, Whitespace. You can get additional information at http://compsoc.dur.ac.uk/whitespace/.
Have fun.
