Paul Thurrott's SuperSite for Windows: "Longhorn" Alpha Preview. I am not particularly impressed by any new longhorn features yet.

Few comments
New welcome screen -- can I plug my own screen which should be fully customizable?
Start Menu -- my contacts is useful .. but will I upgrade for this feature ... the answer is NO.
I don't clearly understand the benefit I would get from my hardware as opposed to the device manager.
My Computer --- Disk space is currently available as a tool tip .. maybe a marginally better way of representing the disk space.

I will update this post with more comments on longhorn.