Alright, so you know the drill by now. A patent application doesn't necessarily mean an actual product is on the way -- but it's always fun to speculate, right? And this latest trio of applications from Apple certainly provides plenty of speculation fodder. The most notable of the lot is an application for a "multi-touch display screen with localized tactile feedback," which Apple seems to be at least considering as a possibility for the iPhone (or iPod touch). Like some similar systems, Apple's application covers a screen that uses a grid of piezoelectric actuators that can be activated at will to provide vibrational feedback when you touch the screen. Apple even goes so far as to use a virtual click
