Going to MIX? Get Twitter and Twitteroo!
Twitter is a simple program which lets you see what all your friends are up to - you enter a short message and all your "followers" get the update. Normally I don't care what all my friends are doing, but this kind of thing is perfect for a conference. The MIX conference folks have set up a Twitter account, so by "befriending" the MIX07 account you can get hooked up with other conference attendees.
Here's info from the VisitMix site:
Text JOIN MIX07 to 40404 and Twitter will keep us all connected as we descend upon Las Vegas for our 72 hour conversation. We'll know who's "heading out to dinner in ten minutes," who is "sitting up for the Ray Ozzie keynote," and even, who is "waking up in the desert!"
If you've got a laptop with you, be sure to install Twitteroo. It's a little desktop client app that updates you when any of your friends sends an update.
There are some other Twitter client apps out there, including a Vista Desktop Gadget.