While the hardware on the outside looks to hardly be a departure from the norm for HP's TouchSmart line , there's some exciting stuff going on under the hood. Of course, multitouch is the big buzz this season with Windows 7 onboard and those fancy Surface apps are fine to play with, but more important is what HP is doing with its own TouchSmart application. It's added panes for Hulu, Netflix, Twitter and an HP Music Store powered by Rhapsody, which work in nicely with the rest of the touch-frie