Limewire uses Gnutella, the largest p-p network. Torrents can be downloaded from anywhere.

I searched for a movie from '68. LW eventually found it after weeks of searches, but I was able to dl only a few MBs before I lost the host. After waiting another week I searched for it on torrent sites; was able to dl it in a few hours.

LW does not comply with protocols required of many torrent sites, (does not track share ratios, etc.), so I suggest you switch to a true torrent client, such as Vuze or uTorrent (both are free).

For more on the subject: Beginners Guide to torrents.