Try connecting to one of these:
gnutella.hostscache.com:6346
gnutella.hostcache.co.uk:6346
gnutellahosts.com:6346
router.limewire.com:6346
gnet.ath.cx:6346
gnet2.ath.cx:6346
connect.newtella.net:6346
cache.gnuranium.com:6346
connect1.gnutellanet.com:6346
connect2.gnutellanet.com:6346
connect3.gnutellanet.com:6346
connect4.gnutellanet.com:6346

For a 56k connection set the min to 4 and max to 6.