REDFLY Windows Mobile Companion
While there were very few smartphones at CES in Vegas, there were several ultra portable devices. Intel-powered MIDs (Mobile Internet Devices) are coming in 2008 and there are several prototypes available, along with existing ultra mobile devices. I saw a few new UMPCs, Tablet PCs, and other connected devices that are showing how you can get work done on systems without a full Windows operating system too.
The REDFLY companion looks like a nice HTC Advantage accessory.