Are you using shareaza or limewire on your PC, now there is a P2P software which help you reach those files from your android phone!
DroidG2 is a P2P client on android which employ Gnutella2 technology which like Shareaza, Limewire, emule which allow you to download music into your Android for free. After DroidG2 successfully connected to the Gnutella 2 network, you can simple download music at anytime, anywhere. Once download is finished, you can start listen to it on you device!!!
The core is a C++ implemented gnutella2 application called sharelin, which is known at the only existing workable good Gnutella2 client on Linux, if you have tried it on Linux, why not give DroidG2 a try on your android phone. It is a great app to lookup whatever popular files.