i've been noticing this too, and as i'm in the process of attempting to write a gnutella client, it's been a little annoying. connect3.bearshare.net goes up and down, but i can connect to any of the others at all. the odd thing is, if i do a 'telnet router.limewire.com 6346' it times out, but if i remove all the hostcache info from limewire, set it to autoconnect, and only leave route.limewire.com in the autoconnect list, in two mintues i have 3 or 4 connections and a full cache list.