The Song Fight Bulletin Board

I've posted this question way back when, however I have a new spin on the old question. I'm (using XP Pro) going to be collaborating w/ someone using a Mac. Is there any good cross-platform file sharing software? Or are we better off using built-in IM file-sending or some such? We kinda wanted to create a P2P but not sure how.

I find just having common access to some webspace works just fine. Or if you each have your own. Just upload your tracks and download theirs.

Ken

gmail works pretty well, too.

The AllPeers FireFox plugin might fit the bill.