Yahoo! Tech has a write up on Windows Vista SideShow gadgets on display at CES and by the looks of the reviews, SideShow has stolen the show.
MIS Credit-card sized companion device: According to the guy I spoke with at the Microsoft booth, this wallet-friendly gizmo is going to be branded Nvidia when it comes out stateside this spring, which sounds weird to me, but whatever (I didn't get the memo that Nvidia was doing actual gadgets, but correct me if I'm wrong). It's cool as heck, letting you access said gadgets—apps like music, email, stocks, and the like from over 30 feet away via Bluetooth!
"Cool as heck" isn't a phrase I hear very often, but it does a good job describing some of the SideShow devices I've seen.