Probably there's no quick fix for us, as you've noticed by the posts.

Your ultrapeers might be overloaded, the stats are easily misinterpreted, and you're not alone. Work is progessing on a new version (see http://www.gnutellaforums.com/showth...threadid=19197), and the Free connects just as well as the Pro. There are other clients available, so trying another for your OS will help you get a feel if the problems are with Limewire or just Gnutella in general.

Gnutella traffic is sometimes blocked by ISP's and hindered by home routers/firewalls, so getting a clean connection is tough. Someone once uploaded from me at peaks of 125 (the 800 MB averaged 79k/sec), but 1 and 4k/sec were much more common.