Here's a list of features:

• Purchase, download, and read hundreds of thousands of books available in the Kindle Store
• Access your entire library of previously purchased Kindle books stored on Amazon's servers for free
• Choose from over 10 different font sizes and adjust words per line
• View notes and highlights marked on Kindle and Kindle DX
• Zoom in and out of text with a pinch of the fingers (Windows 7 users only)
• Turn pages with a finger swipe (available in a future release for Windows 7 users)