A beautiful use of videoconferencing ...

Marine in Iraq Witnesses Birth of Child:

or click here to watch from YouTube 
http://youtube.com/watch?v=fUfv9mRwwkU

Google Launches Virtual World 'Lively'

Create your own virtual space
   Chat and interact with your friends in rooms you design
Express yourself
   Customize your avatar and stream personal photos and video
Add your room to your site
   Invite your friends to chat and help decorate

Requires a download so I'm not sure how useful this would be in the TAFE environment.

Check this out ...

http://www.wiziq.com

and it's free!