What is a kindle ?

Pad vs. Kindle DX

The iPad versus the Kindle DX comes down to this essential question: would you prefer an e-ink display for reading? If you want e-ink because it so closely emulates paper, then the Kindle is the device for you. But if you don't mind an LED-backlit display, you can drill a little deeper.

The Kindle comes with a free 3G data connection, but it'll cost you extra if you do much else other than download books (Amazon charges you for downloading data other than e-books). Amazon's new Global Wireless program also lets you use your Kindle all over the world. Apple's iPad requires a monthly data plan from a carrier that supports micro SIM cards (so far just AT&T in the U.S.). However, you could also opt to do without 3G and stick with Wi-Fi on the iPad.

There's also the question of how many books will be available when the iBookstore launches compared to the Kindle's 400,000-title library. But in addition to iBooks, the iPad should be able to run the Kindle app for the iPhone plus any other e-bookstore iPhone app, which potentially gives the iPad a much larger selection than the Kindle.