Charlie Sorrel has some thoughts over at Wired’s blogs.

Here’s a project I would love to do if I had the time–a face-off between Kindle, the iPhone, the Sony Reader, an eBook Technologies ETI-1, and a few other devices. Take a few book types–novel, textbook, graphical book, business document to begin with–and create a feature matrix and evaluation criteria. Also evaluate the e-commerce experience, the experience with public domain and other free content, and the experience of adding your own content. Write it all up, and keep it up to date.