The Ipod Tablet device has been widely rumoured for some time now.
I was surprised it wasn't announced at the latest Apple event. However the genreal concensous is that it will be launched early 2010. It will basically be a 9.6" Ipod Touch.
Sound great in theory and would be decent for viewing movies, comics, books etc but is a tad too large to be pocket size and will probably be hideously expensive.
Personally I would like to see a smaller version of the Asus concept laptop.
Probably about the size of a Dvd case when shut, so that it would fit in the pocket.