Voice: Gtalk2voip offers a service that establishes (amongst others) voice communications between a standard SIP service and MSN.

Would it be possible (theoretically or practically) for Parmesan to do something similar?

i.e. the user has a SIP phone on a static IP on their network. Parmesan receives a voice request and bounces it to that device. To make a call Parmesan first calls the device and the user picks up, then it establishes a call with the contact.

This would get round all the problems of codecs and sound inputs that would otherwise exist.

Webcam. You (Christian) said in a email that you had a suitable video codec, if I recall correctly. Is there any hope?

I have both a sip adaptor and a video capture podule which I would be more than happy to donate if either of these were to be viable.