To attend the Creative Commons briefing on copyright basics, you have to "go" to a place called Kula 4 in Second Life, a 3-D virtual world. I've been meaning to check out Second Life, which I hear is really an amazing online world. Now that meetings have infiltrated that world, I'm really motivated to give it a try.
For those who have attendees who want a little more reality, but can't make a meeting in person, check out what CustomerMade conference organized by Innovation Lab in association with O'Reilly Media Inc. is doing (via BoingBoing):
Pretty cool, huh?
And then there's Ben's idea for using technology for live meetings. There's more, but here's a snip: