I'm not liking Shareaza so much these days, unless you get directly connected to another Shareaza user it's basically useless.
It just goes onto the eDonkey network as well as Gnutella 1 and 2, and eDonkey's a complete joke.
I'm considering binning Shareaza and trying LimeWire. I didn't think much of WinMX either.
Master of common sense. If you don't like it, stop reading.