Here's a glimpse into the inner workings of the Gizmodo story selection process:
The Sonic Devestator, available in both a personal handheld model and a 'riot control' versions, uses ultrasonic waves to induce "intense pain and discomfort in humans and animals" from a range anywhere from 20 to 50 feet. You can buy one pre-built from Future Horizons, or order the plans for a DIY project. I can't wait to see this in the 'Roll Your Own Revolution' issue of MAKE Magazine.
At the risk of making this post take up the whole page, I should probably make it clear that Future Horizons is—at best—a company dealing with technology on the very edge of engineering possibility. Take, for example, the Rife Machine 2, "A 21 day do it yourself cure for HIV...that can easily be built from parts obtainable from Radio Shack."