Don’t want to make it a kindle vs. Sony argument but before buying Sony I had kindle with me for three weeks. I bought it for the reasons stated in some of the previous posts (wikipedia, weblinks and google). But for me the browser on E-ink was useful only for buying books and nothing more. I could not get the right settings for kindle even for Amazon (maybe I didn’t understand how to use it) and ended up spending more time in making it display those websites better rather than reading. Meanwhile I saw Sony 650 at Waterstones and it blew me off! Love at first site... (maybe I was always biased towards it from the reviews..

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The best part, I don’t miss internet on my reader. Maybe I am too engrossed in the books to miss anything.
I will consider using browser on Reader but only when E-ink is advanced enough to turn the pages without its annoyingly slow refresh rate. Until then I am more than happy to buy books on my laptop.
Cheers!