I think, this might itnerest you, too:
http://www.pocket-lint.co.uk/news.php?newsId=4912
Pocket-lint.co.uk - UK
... as much more than a music file sharing tool in the future; it will also distribute news stories, research papers, and more, all via the Gnutella P2P network. ...
http://www.slyck.com/news.php?story=1299
Slyck - Astoria,NY,USA
... afloat. Open source has also kept one US based P2P client afloat – a pesky, thorn-in-the-side Gnutella client named LimeWire. ...
This is exactly, why I bought my Pro-License, even though I don't even use LimeWire most of the time!
(I'm a Phex-User)