Hey Dudes!
There has been some hub-bub going around about people rushing to 'download' their ebooks before amazon removes the 'download for usb' option. You can see an example here:
https://www.youtube.com/watch?v=8mVGqNqowT0
But at the end of the day - amazon's move to remove this 'feature' is basically pointless. People are stating 'hey your taking away my ability to 'own' a the book.