Videocalls wouldn't be possible for the first release.
Skype gives the developers no possibility in their API to grab the videosignal ...
Many developers working with the skype API longing for this, as you can see here for example:
After my thesis and the first release i will give some "hacks" a try (like video capturing).
I also wanted this feature for my thesis, but the restrictions of the api for videocalls are really really great
I can implement a button to start/stop sending your own webcam signal, but as I already said: there is no simple possibility to access the videosignal via the skype-API.
Would this button suffice, for the first release?