I picked up my copy today when it came out. I got the last one there ( Phew) When I listened to it the whole way through my first impression was that it was like a mix of OK Computer and both Kid A and Amnesiac.
My favorite tracks so far are :
2+2=5
Backdrifts
Go to Sleep
Where I End and You Begin
There There
A Punchup at a Wedding
Scatterbrain

I know I know that's half the CD, but oh well I can't choose 1 or 2 or 3. This is not to say I don't like the other, those just stood out for the first listen.

To the few ( it seems ) Radiohead fans out there please comment on the album if you have gotten it.