I'm attending my first Tweetup on January 28th. Thanks to Chris Farias, Jen Hudder and Meg Coppolino for putting this together.
If you live in the Hamilton, Ontario, Canada area come and join us!
They are using Twtvite to get the word out and manage registration. It's a slick tool but I would like to be able to quickly scan and learn who is attending as illustrated in the screenshot below.