These little babies made their first appearance at CES back in January and they are finally ready to go, kind of. Amazon is taking pre-orders for an expected March release. This digital audio player really is pretty cool, must be why it carries such a hefty, $399 price tag. It is palm sized and weighs only 4.5 ounces. It allows you to listen to all of the XM that you want while also supporting up to 50 hours of XM recordings and storage space for your own MP3s or WMAs. Probably one of the best features, it already has an integrated FM transmitter—terrific for streaming to the car.