Do I think Kindle is destined to succeed? Well ... this reader's a turkey, but the Kindle service might succeed, if they can iron the bugs out. But they're going to have to make a whole lot of changes, and some of those aren't up to Amazon — the publishers need to change their minds about DRM, and (perhaps more controversially) to accept that it's necessary to renegotiate their rights splits to permit a true worldwide English language ebook market to evolve.
[i categorically refuse to buy anything that comes with kindle-style DRM, so i watch the discussion over this bit of cybercrud with great amusement.]
related reading: mark pilgrim's the future of reading (a play in six acts)