If you are Skype user, your in for a bit of a treat - multi person video conferencing over skype, and cross-portability with jabber.
This is big news, as it means, your video calls are no longer limited by one to one conferencing, and can finally break free from the confines of the Skype network.
You will be able to make a video call with up to 16 people at once, and everyone in the conference can be on different instant messengers.
So if your using Adium, MeeBo or Google Talk it doesn't matter, you can call up to 16 of your friends on Skype or have them call you.
Someone said, that if you can't explain a result in simple, nontechnical terms, then you really don't understand it. 