Bearshare is better than Gnotella (in it's current state) if you can get around Bearshare's connection problems. Gnotella's ability to switch sources for downloads on the fly is VERY nice. However, Gnotella has serious problems like slowing to a crawl, at which point you can't do anything with it. Memory leak or something.

I wish Bearshare would connect better and search/switch download sources.