The second session I went to was about a digital comic reader similar to the NY Times Reader, but for comics. The reader was very, very slick. They talked about the requirements collection process, and their UI concerns. The reader was built with WPF, and can use JPGs, or XAML. We also got a demo of some of their user controls tha they used to build their comics and the reader. This was a really cool example of what WPF and XAML can do.