I just picked up a Sony 900 from Best Buy in Atlanta about an hour ago.
After loading an ebook I had already purchased on it, I have to say I am a little disappointed at the contrast on the screen. I don't know if it's because I haven't charged the battery yet (it was plugged in as I was reading) but, looking at a book under the same light, I think the contrast leave a lot to be desired. Is there a contrast setting?
I am taking it on a business trip this week. If I don't like it, I'll return it next week.