Just to add my 2 pennyworth.
The Zaurus SL5500 was a much better screen than my old palm. And it doesn't _compare_ to the e-ink screen.
It really is like reading paper (Ok the back is light grey not white) but it really does look like it's been printed. The amount of people at work or on the tube that thought it was one of those stickers they put onto phones and the like to simulate their screen, when, its on in shops was amazing. It is that crisp and that different to a "normal" PDA screen.