There is no P2P for sharing.  For a class setting, a professor would have to e-mail her students and they could have it on their Kindle DX in that way.  You can’t just ask your friend to send over the file from Kindle to Kindle. 

Why “DX” designation?  It actually stands for deluxe since it is a bigger model.  So I was wrong when I thought it stood for developer xylophone (in retrospect, that didn’t make much sense). 

Amazon plans to do future industries like medical and legal later.  They are just focusing on colleges and newspapers.  High schools and grad schools will have to wait. 

The Amazon Kindle DX has 3.3GB of space and still does not have an expansion port.  The textbook demoed during Jeff Bezos’ presentation (a biology textbook) only weighed in at 10MB.