Rebecca Stern from FAT Labs and Sternlab made a hoodie function as a TV-B-Gone. I think we had tossed around the idea of doing this, though her execution is really slick—you just have to zip or unzip the zipper to turn the targeted TV off.
This is the TV-B-Gone—it is a single-purpose universal remote that is used to shut off a large variety of televisions. You can see a video of it in action. It’s open-source, so it’s fairly easy to build using the instructions included on Ladyada’s website.
I was thinking about combining that with the Turn-Signal Biking Jacket project we looked at last week. We could basically build this remote into the front pocket of a jacket and run a switch to the tip of the sleeve and the go around the mall and turn off all the TVs.
And on a different, but related note, check out this blog, Creative Physical Computing, many, many in-progress projects using things like Arduino, Max/MSP/Jitter, Processing, Quartz Composer, etc.