If you have any interest in internet governance, take a look at igf2006.info.  Everything about the upcoming meeting in Athens (the Internet Governance Forum) is there.  There are more than a thousand people going to this meeting. 

You can sign up for the site using a pseudonym (note to Ann Onymous), and you'll be part of a huge amount of online collaboration in connection with the meeting.  Create your own blog, add or edit a wiki, create a chatroom, a page, a new event -- whatever.  Everything known about the meeting is there, and the links to webcasts/audio casts will be up as soon as they're available.

Congratulations and thanks to Kieren McCarthy for getting this site up.  It's ready for use, and it's really useful.