I had the same problem as eveyone else here. I did a little research on port forwarding and found the site PortForward.com - Free Help Setting up Your Router or Firewall
It will help you configure your router to allow the Gnutella network
This is the page I went to once I clicked on Gnutella.
PortForward.com - Free Help Setting up Your Router or Firewall
It has a listing of different router names. Just find yours and go through the directions. Hope this fixes yours like it did mine.

Odd, I have a lynksys router and never did the port forward setup. I just looked and my "behind a firewall" selection in preferences isn't checked either (Gnucleus 2.2.0.0)

Same trouble here... connecting forever and then nothing. I did the port forwarding setup on my netopia router but it didn't help. It even had a built in setting to allow gnutella to run (a long with a list of a 100 other games) but turning that on didn't help. What can I do this blows? I have what I believe the to be the latest version of gnucleus 2.2.0.0...

Also any recommendations on other spyware free clients (besides limewire/alphalime - I don't dig the java stuff...)