Each week Ross Rubin contributes Switched On, a column about consumer technology. Last week's Switched On discussed how some next wave notions from a decade ago were trying to reinvent themselves. Here's one more. Surging smartphone vendor HTC is seeking to bring back an input method that many wrote off long ago with its forthcoming Flyer tablet and EVO View 4G comrade-in-arms: the stylus. A fixture of early Palm and Psion PDAs, Pocket PCs and Windows Mobile handsets, slim, compact styli were once the most popular thing to slip down a well since Timmy. Then, users would poke the cheap, simple sticks at similarly inexpensive resistive touchscreens. After the debut of tablet PCs, though, more companies started to use active digitizer systems like the one inside the Flyer. Active pens offer more precision, which can help with tasks such as handwriting recognition, and support "hovering" above a screen, the functional equivalent of a mouseover. On the ot...