The Nokia 770 would also be an Option. I am using it as an substitution for the Ilead while waiting for its public release and it is ok to read ebooks and PDF's.
At least it is nearly "instant ready to go" compared to a laptop and much better quality then my VGA PPC and better price then a tablet.
Display is great but of course no comparison to an e-ink device ...
But the best thing is in most parts of europe you can go out like me and have your Nokia gadget in under 2 hours bought of a shop near you