joined inter-pals mostly for language exchange. I'm learning Japanese (I'm still a beginner). I can help you learn Greek (if for some crazy reason you are interested in learning it) or English. Or I can help you with your math homework :P
I would also like to have regular pen pals (e-mail or snail-mail), especially people who are different from me in some way (much older or much younger, from a country very far away) and can give me a different perspective on things.