Fire up Shareaza, press F9 and choose a GWebCache. Click with the right button of your mouse on it and choose Query Now. Do it with a couple of GWebCaches if the first attempt doesn't work. Alternatively, head over to
http://gwc.frodoslair.net/beacon/gwc.ph ... =gnutella2 and click on an IP address, and again, do it with several different IP addresses if the first attemps doesn't work.
Shareaza just needs to find the IP address of a Gnutella2 peer to initiate the connection to the network. It will also fill its cache with such addresses, so you're not going to have to do this again anytime soon.