So I thought I'd kick things off with a problem I'm having, though I'm posting with the intention that this turns into a general Google Talk on 2006 discussion (I mean the VOIP part specifically I guess).

Works fine between me and a friend when either one of us is connected to the desktop client. 770 to 770 just isn't working.

[] Although we both have pictures set up, they don't appear.
[] Calls get through, i.e. the client rings no matter who initiated the call, but when the other party answers, it says 'Connecting' until it times out.

Now it occurred to me that it might be a firewall issue so we disabled them at both ends, and added port forwarding for 5222 - still the same issue (though I'm not certain 5222 is for the voice part - it's on Google's help pages, could be just for the jabber text chat traffic..?)

Could it be that the desktop version uses some kind of port forwarding, maybe using UPnP? (that maybe the Nokia client can't do yet?)