So yesterday I fired up the trusty Limewire and it said there was an update available. So I went and downloaded the update and now it dies with a class not found exception. So I went on the search of a new Linux P2P application, I found one that works its called the giFT network. There are not a whole lot of people on but you can usually find what you want and its moderately fast. You also need an interface to your server process that you run, I am using giFTcurs.
Update: So this article now shows up first when searching google for "linux p2p". Of course now I use bittorrent for most of my large file transfers. Otherwise I have found nicotine(using the soulseek network) to be a very reliable method of attaining files.