I've been trying to learn a few languages off and on for a while, but a lack of conversation partners usually ends up making me dormant again. I was recently introduced to
www.Livemocha.com and so far it seems like a pretty simple and useful tool for the self-motivated. It has a Facebook-like layout and a community of speakers that you can submit recordings to and they can give you feedback on your accent, pronunciation and so on.
I'm still new to it, but my room mate has been using it and it seems like a pretty handy resource for anyone looking to jump into another language, so thought I'd pass it along!