I'll admit that I don't know all that much Old Norse (mostly Óláf vegr ormrinn, but yanno), but it's a hella' fun language to study.
So the few of you who are studying Old Norse, why do you do it? Myself, it's because I've always been fascinated by Norse mythology and as a result the language. This is obviously also because it's the parent language of my own mother tongue, Norwegian, so to me it's fun just seeing the etymology and evolution of grammar.
Also, Old Norse is eightfold cooler than modern Scandinavian.

Here are the resources that I'm using, if anyone could use them:
http://www3.hi.is/~haukurth/norse/
http://norse.ulver.com/dct/zoega/index.html
Also, pen pals would be great. It's easier to learn a language if you practise it, right?