http://www.kaizoku-fansubs.com/ has subs for "one piece" and i think a few others. They use bittorent and the files tend to be on the huge side. Sorry I don't have more links you can search for "fansubs" on yahoo and get a lot of websites. P2P filesharing programs usually have subs shared as well (I use limewire). IRC is the biggest source for fansubs though, most fansites will probobly link to an IRC channel.