ASUS Eee T101MT Tablet netbook
is available in Europe now and will be in the US - very soon.
The HP Slate do in June will have an Atom/Pinetrail
Do you actually need the ION video chip? Or just need a netbook that will do HD video?
There are Atom N450 netbooks with the Broadcom Crystal HD video accelerator. Eee PC 1005PR
due in April. 1366x768 HD LCD screen.