Here are some pics of Readability on the iPad 2 (left) and the “new” iPad (right). You can see how well the new screens render Hoefler & Frere-Jones amazing fonts. You can open the full images below but be warned, they are large.
Readability is Retina ready and available NOW in the App Store.
Get it for iOS (iPad/iPhone/iPod)
Follow Teehan+Lax and Readability on Twitter.