Technology's anorexic trend in has claimed another victim, this one a GPS device. Taiwan's Power Digital Card claims that its "Guide Dog" is the world's thinnest navigation kit, according to Navigadget. Even if it's not, this dog still hunts. Its roster of impressive features includes a 4-inch display, built-in antenna, 3D gaming, Web browsing, e-mail and a "parking sensor," whatever that is. We can't verify all these claims, but they already had us with the 4-inch screen.