Right. You might want to turn off your music, because this one takes concentration. This is a t-shirt. It's a Reactee t-shirt, which is a pretty complicated concept for an item of clothing. Basically, people who see your t-shirt can text the number on it and receive a pre-designated text back from you. Why would you want this? Well, you can let people know stuff, like if you were busking, you could direct people towards your next gig. You can also use it as a kind of social or political statement - there's one created on the site at the moment which is entitled 'Save Darfur' and the reply text directs people towards a petition.
This latest Twitter incantation will send your latest Twitter update to whoever texts the number on your shirt. Confusingly, the suggested text on your shirt is "What am I doing?", which is probably the one thing you'd already know by seeing someone wearing the shirt. Still, an interesting concept, although sadly it only covers the US currently.
Product page: Reactee [Via Emily Chang]
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From: Five reasons Foursquare will be this year's Twitter