TiVo Slide Remote control with QWERTY keyboard is available on TiVo website at $89.99. The keyboard doesn’t use RF as I expected. Except that it uses Bluetooth. The Slide Remote is compatible with TiVo Premier / Premier XL DVRs as well as with TiVo Series3, TiVo HD, TiVo HD XL units.
It’d be really nice to use such remote not only with TiVo products. But I’m afraid we have to wait QWERTY remote from Boxee Box.
UPDATE: according to Engadget review of the TiVo Slide Remote it works fine with any PC as ordinary Bluetooth keyboard.