CNet's Crave published a story that Asus would be working with Apple on some kind of Tablet computer.

It would be a complete new design and possibly matching the patent Apple filed for a tablet style computer. Asus is already building Apple notebooks, which makes it feasible that this is a true rumor.
It is a pretty thin rumor and of course most people will be immediatly be reminded on the failed Apple Newton when they hear about an Apple pen or touch interface computer. Possibly we are ready now for a multi-touch super crisp display sporting Apple Tablet PC - we will see.

More details on Crave. Via Apple Insider.