Hey everybody, I too am experiancing the low download rate problem and I think I *May* have found a solution.

According to this site,
http://p2p.weblogsinc.com/entry/0401842428674831/
, the problem lies within the router. You need to set your routers Port Range Forwarding to unblock LimeWire. For instructions just follow the site above.

However, I myself havent really tested this myself due to problems with my own router. Please attempt to fix this using the solution.
~Queeny

oh uh if anyone happens to have information regarding using a SMC7401BRA serial code router, please post it here. Thanks.