David Pogue reviews the Barnes & Noble Nook electronic reader at the New York Times, and finds it a poor competitor to the Kindle for identical features, while its unique features don't measure up to a real difference. follow link
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In Apple Mail, if you need to work back and forth between two different views of Mail's mailbox contents, you can do so quite easily. For example, you might want to look at a mailbox holding all filtered-in sales orders from the past week while also looking at a smart mailbox showing unanswered customer questions.
To avoid constantly clicking between mailbox views and losing your context each time, choose File > New Viewer window to get a second window and then arrange each window as desired.
- ExtraBITS for 14 December 2009 (14 Dec 09)
Pogue Finds B&N Nook a Weak Digital Reader
And honestly, I don't think either Amazon or B&N would really care that much - both are booksellers, not gadget-makers, and would probably do well to focus on their core businesses.