I've been looking at the Archos 9 tablet, and am just about sold. Not so much for reading, but for a sort of netbook with a better form factor. And, since it's Windows 7, it will run Flash. Cons include a resistive screen, but I can live with that as it has an optical mouse pointer under the right thumb and left and right mouse buttons under the left.
Specs are
here. (Link goes to archos.com)