This one popped up in the rumor mill a few months ago, but is now official - at $79 for the keyboard, $59 for the sidewinder mouse that you've seen:
Odd features like a right/left attachable numpad, but which also acts as a fully programmable macro pad in gaming mode (which is kinda the whole point to being able to attach it on either side). Backlighting, of course, custom profiles, continuing key press, in game macro recording, and of course, a lighted D key! (okay, it's all the WASD, but whatever).
A quick launch to Vista's Games Explorer will be used by almost no one.
Engadget