T-Shirts Meet SMS: Reactee

I just can't get enough of these Tech tees that are apparently the upcoming rage. The latest is a line of interactive t-shirts that combine fashion, SMS and activism through “shirts that text back”.

This isn't a fancy animated shirt or anything like that. It's a service where you create your shirt, similar to Spreadshirt.
But this shirt includes a number you can text to and it'll text you back with information. They're saying it could be useful for DJs to broadcast their playlist, but what else could it be used for?

Reactee via TechCrunch