Irony: The best way I’ve found to discover which filesharing networks I should use is to look at industry reports about what filesharing networks everyone is using. I don’t have any friends that are in to the whole downloading thing, so I don’t have anyone to ask directly. A recent slideshow mentioned edonkey2000 was incredibly popular. I had heard about it years ago but it never really registered as something worth checking out. I did, and it seems to work quite well!