Um, I just googled it to make sure, and here's what I found...
http://www.skype.com/intl/en-us/features/allfeatures/group-video-calls/At least one person on the call needs Skype Premium or a group video subscription from Skype Manager.one-to-one video calls are free for sure, I've used that many times, and group voice as well, but for group video at least
one person in the call would need to have a premium account.
Still, group chat, even if text-only or voice, could be interesting. Not to mention the spontaneous one-to-one conversations at
any time, something tinychat doesn't allow.
On of the good points of tinychat is the ability to watch youtube videos all at the same time, which can be quite fun. Ideally, we should use both services depending on the needs of the moment.