t-break posted a review on the Western Digital Velociraptor

The Raptor is now a 2.5" drive although don't get your hopes up about equipping in into your notebook- its power requirements and height wont allow you to do that. While the 2.5" form factor is nice, it means that you'll probably end up buying the 5.25" IcePAK heatsink/cage for it separately which could be a bummer.

Western Digital Velociraptor Review