Using WP-to-iPad you can easily create and publish an iPad magazine with WordPress. There are free and premium versions
Offer your WordPress blog readers an optimized version for iPad with just a few clicks! Opt for the paid version to take advantage of various options to customize your iPad magazine.
Features:
Very simple to install (in less than 3 minutes)
Many design choices
Interface customization (color, number of categories to display)
Design for the iPad touch screen
Integration of social media: Twitter, Facebook
Application icon
http://wp-to-ipad.kinoa.com/
Download: http://wordpress.org/extend/plugins/wp-to-ipad/