My wife's birthday is in 2 weeks and she wants an e-reader. She asked for the Nook since all we need is the wi-fi as 3G would be a waste (terrible cell phone coverage at our house). The wi-fi only Nook is $149. Now is see the wi-fi only Kindle is coming out for $139 - but not until 2 weeks after her birthday. So my question is: should I get the Nook she asked for, or wait and get her the new Kindle when it comes out? Her sister has a Kindle, and I'm wondering if I got the Kindle for my wife, would they be able to share books, with only one of them having to buy and download the book - just like they used to with paperbacks? I assume if I buy her the Nook, they definitely won't be able to share books between Nook and Kindle. Does anybody know if Nooks can share books between them? Anything else I should know about either device? Thanks.