St. Martin's Press has released a new version of
Paranoia, by Joseph Finder, for the Kindle (see my previous post for a synopsis). Rather than updating the existing ASIN, though, they removed that book from the store and added the new one - so you can purchase it again (it's currently still free, although they claim it's list price is $24.99) and have both editions in your library.
I've looked at both and although the number of locations increased by approximately 50%, the formatting of the text itself seems the same (from a very cursory glance), but there are some differences. The new edition doesn't have a cover (it has a plain bookplate instead, which is marked as the "beginning" of the book), no table of contents (there is a list of chapters on the last page, but it isn't linked at all) and is missing the "e-book information" pages at the tail end of the first edition. What's new is a fairly long sample from Finder's upcoming new book, Vanished ($14.29 pre-order). All in all, this newest edition looks more like a first stab at the book, rather than an update, but you may want to pick it up just for the sample.