I am suspicious of the Kindle model on two counts.  The first is simply because of their apparent basic model that essentially I am renting access to books that they still own; I know that they promised not to repeat the mass recall of bought books that they did in 2009, but it is only a matter of trust that they don't.  Nothing keeps them from removing content except for that promise.

I'm sorry, but I guess I am stodgy and old-fashioned, perhaps downright curmudgeonly in this respect:  I want to <i>own</i> what I have bought.

The second is actually their policy towards authors and publishers; I'm referring, of course, to the battle which involved Amazon's weeklong shutdown of Macmillan titles last year.

I don't disapprove of the idea of storing ebooks "in the cloud",and like I said, O'Reilly have made a good go of ensuring access to ebooks they sell; but until and unless a book distributor comes along who I trust and trust to act ethically towards others, I'm still in the same position.  This just isn't a good technology yet.