Coming next month to a store near you (via the New York Times):
The cone of silence, called Babble, is actually a device composed of a sound processor and several speakers that multiply and scramble voices that come within its range. About the size of a clock radio, the first model is designed for a person using a phone, but other models will work in open office space.
I’m imagining all sorts of cute hacks you could do with this. I especially want to set one up to cancel out my speech and simultaneously play music or pre-recorded/synthesized speech over it — turn your whole conversation into a badly dubbed movie!