Remember those hazy days of summer when HP ran an ad during the Olympics, slipped in a a shot of an unannounced tablet and thought we wouldn't notice? (P'shaw!) Well, you can finally lay your speculation to rest, as HP just formally unveiled the mystery tab, along with a slew of accessories. It's called the ElitePad 900 and, as rumored, it's a 10-inch Windows 8 slate meant for business users, with features like pe
