Collaboration software

I have posted a link to some free web confrencing software, it allows for collaboration between colleagues, where participants can communicate through audio, video, share a common on screen white board, computer screen e.t.c.
The free software available, only allows for three people within a meeting room at any one time, but for more dollars obviously a room can be created for any number of people.
I'm not attached to this particular software in any shape or form, but I think it is a great free tool not only to download, but also extremely cheap to run via the net.
As mentioned it provides a convenient platform for collaboration between interstate and international colleagues which could prove useful for some.

http://www.elluminate.com/index.jsp