A good review on this tool (in Dutch) can be found here at Pierre Gorissen's blog.
The great thing about tokbox is that you do not have to install anything and you can simply embed this videotool into a lot of social softwares. People can just click on the embedded frame and start videoconferencing. Nice!
You can even send me a videomail if you want to, simply by clicking the 'mail' button underneath. Neet.
Get your own TokBox at www.tokbox.com.