This is the new thing from Frontier (the people behind the popular Tranzport wireless controller, who also designed Tascam's nicer recent interfaces). Alphatrack is a USB controller with a single motorised fader, 3 touch sensitive knobs, transport and other controls, and a ribbon controller for scrubbing back and forwards through the track ("Use one finger on it to move the scrub through your project's timeline, and two fingers to jump in and out of shuttle mode."). It's obviously not a totally new idea, but looks good. Expect a $199 street price. (Thanks Jerry, more on his blog)