Thats a very interesting point about books as apps and sharing them. Amazon allows upto 5 devices too. So other people in the family can use the same registered device ID and share all the books.

It is not the best solution though.

I think the playbook is out there to test QNX and then to use in RIM's smartphones.

Also, if you consider the idea of working on the PlayBook using the info and data in the BB phones that is fantastic in a work environment.

Use your emails, docs etc on the PLayBook when the phone is in proximity and also utilize the cellular connection of the phone.

I think they have some really good ideas there.