Check out this blog posting:
http://www.geardiary.com/2009/06/19/...nd-it-is-ugly/
Apparently there is a maximum number of times you can download a book you've purchased on Amazon. Has anyone run into this already? This is the first I've heard of this and it is obviously concerning as people upgrade their devices. You can obviously circumvent this by keeping a copy on your PC, but it's a bit of a surprise given Amazon's positioning that all your books are backed up online.