over the years, many of which have seen advances driven (so to speak) by various DARPA challenges. But now that Google's involved -- whoa! -- the mainstream media is suddenly whipped into a frenzy of hyperbolic proclamations about the future. Still, it is fascinating stuff to watch. So click on through if you like having your tech salad tossed with a side of smarmy TV-news voiceover. Trust us, it's delicious.