Sure, the t-shirt at right looks cool. Bold graphics, cute design elements, and a reference to Twitter (a trendy new social networking website) -- how geek chic!

Oh, but there's more. The "Reactee" can give anyone who sees you updates on your life. All they have to do is send a text message to the number on your shirt, and they'll get a pre-designated text back from you.

You could use this as a walking billboard for your favorite cause -- like an "Obama For President" shirt that sends people campaign information -- or as a way to promote your band's website while you're busking on street corners. The above example sends your latest Twitter update -- so however you were feeling the last time you used your computer can now be available in real time to anyone you pass on the street.

[via Shiny Shiny]