Something that Amazon needs to address is the current inability to permanently delete something from the archived items or from content manager, depending on which Kindle you own. There are many reasons for someone wishing to do this.
Countless times I have read on various Kindle forums of people who wish to buy their adolescent child a Kindle and share the account, but are leery of doing this because some of their past purchases have been too racy for children that age. They want to be able to get rid of the books permanently.
It is not the only reason. If you have been at this for any length of time, you have accumulated a lot of books in the archive. Many of these you will never read again and maybe didn't even especially enjoy the first time around. We can't always make good choices.
And sometimes we latch onto free books just because they are free, and they didn't work out for us.
Currently, if an author decides to revise his or her book under the same ASIN number, so that previous buyers will receive the revision at no cost, the revision is not available for anyone who has annotated or bookmarked his copy. This is because of a glitch in Amazon's software. The only thing which will make the new edition available to previous buyers is to issue it under a new ASIN number. Go to the Kindle store and type in David Emberson in the search box. You will see three books, the first of which is The Kindle 2 Cookbook: How To Do Everything the Manual Doesn't Tell You by David Emberson (Kindle Edition - Feb 27, 2009). The third of these is The Kindle 2 Cookbook: How To Do Everything the Manual Doesn't Tell You (Alternate ASIN) by David Emberson (Kindle Edition - Feb 27, 2009). Sandwiched in between is the book for the K1 reissued. David had to do this alternate ASIN thing so that those of us who purchased and annotated the first book would be allowed to buy the 2nd edition. It was the only way.
Why can't Amazon devise a method of allowing us to permanently take books off of our virtual bookshelves? They shouldn't make it too easy or something you could do accidentally. Obviously it should be done from your Amazon account as opposed to doing it from the Kindle itself. I wouldn't even care if it came with a popup box asking if we were sure, and another warning you that you will never see this again. Make it as obnoxious as you want, Amazon, but please let us do it.