It's fairly straight-forward under Ubuntu. This shows up as "SN9C10x" and "spca5xx" in dmesg when you plug it in. You just install libpt-plugins-avc and it works straight away in Ekiga. If only the rest of my interactions with Ekiga were as pleasant.
For the record, it's a fairly shit camera, it does nothing to compensate for dark or light, so it's fairly useless except in daylight! Whether that's the camera or the drivers fault, I don't know but the quickcam I played with was heaps better.