I can see how this increases availability, but shouldn't those same files be available to *any* peer? I've had SwapNut users download from me, and I really hope they aren't just leaching from the g-net without giving anything back.

Funny, I wonder how they reconcile "forced sharing" with their "don't share any copyrighted material" claim on the web page? Everyone (quite legally) probably has copyrighted works on their PC of some type, by sharing them by default (perhaps without newbies even being aware) aren't they actually encouraging violations? This was one of the arguments against Napster and it seems like a good grounds for a lawsuit.