Not that anybody cares on here but me and maybe a handful of others but I think the best Gnutella client for the Mac is iSwipe.
http://www.hillmanminx.com
Not that the Gnutella client is all that great. I mean its good but not Shareaza (PC) good. Whats cool about it is that it searchs bunchs of networks all at once.

If your a true leech of leechs than this is the proggy elite for you.