http://www.engadget.com/2010/05/27/b...e-go-hands-on/
"eReader is actually quite flexible -- you can customize the page, text, highlight, and link colors any which way you want (we made some hideous combinations), and there are some nice presets themes as well, ranging from "The Printed Page" to an inverted setting called "Night Light." You can also set books to display using the publisher's settings, and there are the usual line spacing and justification options as well."