This is for people who live in Google Land. Who, between chattering with these 500 people, go to SXSW or whatever you call it while twittering. In other words, it's for Gina Trapani. And maybe Leo Laporte. (Leo has an account, but I'll bet he has no more entries in his account than I do.)
If you're having a distant meeting, try Skype or GoToMeeting, or... a phone. If you want something for the record, there's e-mail. If you want something legally binding, use registered mail.