San Francisco's annual Arse Elektronika events sees the sexiest of the geeky (or the geekiest of the sexy) trying to outnerd each other with fabulous sexual inventions that are impractical, implausible, and exactly what you want for Christmas. It's also a great way for tinkerers of this sort to experiment with new and wacky ideas. Like, say, a vibrator that's hooked up to the U.S. Geological Survey and only buzzes when there's an earthquake somewhere in the world: you just plug it in, turn it on, and ... wait for a completely unpredictable natural disaster! Only trouble is that when your own "Big One" finally arrives, it's tempered by the realization that a building might have collapsed somewhere with people trapped inside. Talk about a buzzkill.