Well, the Windows 7 HP Slate is back:
HP: no webOS netbooks, HP Slate due October 2010
It will run Windows 7, but really, what's the point?
It has 8.9" screen - a little bigger than a cheap Chinese tablet, but smaller than the iPad.
The battery life is only 5 hours. This is right in cheap tablet territory, AND it's non-user replaceable.
The boot times for W7 on AtomZ5xx will be looong.
The Slate is better off dead, really.