What are your thoughts on the Amazon Kindle?

What improvements should they make on it or you think they should change or add to it? What other e-book reading systems are out there and how do they compare? It would be great if students didn’t have to carry all their books everywhere & they could save both money & paper in the future. Also if you can download the books to your notebook or desktop pc at home so you wont have to buy a kindle. I don’t know if that exists yet, but if it does please let me know.

Kindle: Wireless Reading