The good: Slimmer, more compact design than previous Kindle; improved screen with higher contrast and faster page turns; native PDF support; large library of hundreds of thousands of e-books, newspapers, magazines, and blogs via Amazon's familiar online store; built-in free 3G wireless "Whispernet" data network, plus Wi-Fi; built-in keyboard for notes; with 4GB (3.3 usable) of internal memory, it's capable of storing 3,500 electronic books; eight fonts available, including two new extra-large sizes; excellent battery life; displays image files, and plays MP3 and AAC audio.
The bad: No expansion slot for adding more memory; no support for EPUB book files; no Nook-like lending feature [amazon has just implemented lending]; no protective carrying case included; battery is sealed into the device and isn't removable.
The bottom line: The third-generation Kindle's winning combination of noteworthy upgrades--an improved screen, better battery life, lighter weight, and lower price--vaults it to the top of the e-book reader category.
Read more:
http://reviews.cnet.com/e-book-readers/amazon-kindle-3g-wi/4505-3508_7-34140425.html#ixzz1AD5cuIWV