At the moment, none.
I, however seed a TB or two of new Ubuntu releases when they come out. Usually takes from half to one week to get 1 TB seeded.
People just don't leech enough.
try this lot [microsoft.com]. Their disto still seems fairly popular though
Tell me about it, been trying to get this one working for ages. Firstly, my friend tells me it's only available on bittorrent, instead of just downloading it from their site. Which is a bit weird, but whatever.
Where I'm really having trouble is with the package manager. How do I add a software repository in that add/remove programs thing? It doesn't seem to mention what type of packages are compatible with it either. Am guessing RPM or DEB, but which is it, maybe someone could enlighten me?
To be honest, I'm about to give up on this Windows thing, it's just not ready for the mainstream.