Thanks for letting me know about using PC SIP clients. Gizmo's video performance was not good (at the PC receiving end from the N800), so I will definitely try alternatives like Eyebeam.
Also they do support the proper video codecs, so it "should" work between say a N8xx using SIP and a PC using the Sightspeed SIP software.
However the big difference between Sightspeed and Eyebeam is that the Sightspeed software seems to be bound to their service, whereas Eyebeam can connect to any SIP service including a server you run yourself.
I'll have a look at trying it out in the coming days :-)
Edit: Well I managed to set up a second SIP user on the N800 and after sorting out authentication names, actually made contact!
I can't say the video quality is anything to write home about, we all know the N800's camera spec., but I did receive N800 video on my iMac's Sightspeed app.
Back on the N800 there were moving shapes but I wouldn't call it video.. I can well imagine the N800 doesn't have power enough to handle Sightspeed's quality, and as yet I haven't found a way to reduce the quality..
Still, its a step forward
Edit2: The final status is that I can call the N800 from Sightspeed on the iMac and connect ok, the N800 image appears on Sightspeed within seconds, but it can take half a minute or so for a still image to appear on the N800 from Sightspeed.
Calling from the N800 to Sightspeed connects but clearly something goes wrong with the handshake so the connection is dropped 30 sec later.
