Been thinking about one of these myself.
There's an 8G on the way with a bigger screen - slightly bigger overall apparently but same size keyboard if I understand correctly. Don't know whether this takes it nearer the small laptop size and thus does away with some of the benefits. Also I see that some now come with Windows - again eating into the benefits that it offers! Haven't seen any expected prices for the 8G yet but one website suggested that it would be available in June.
Dop, one question on the battery power - what exactly are they? Is it a container for some conventional AAs or similar or is it a rechargeable pack? And does it come with a mains adapter?