Looks like Amazon intends to bring its Kindle e-book format to the iPad and other tablet computers. It just released a reader for Mac OS last week. This is smart: even if the company sells fewer of its Kindle readers (sales supposedly have plummeted since the unveiling of the iPad), it can still try to sell e-books in its format. And those of us who own Kindle-formatted books will be able to use them on the iPad. (That is, unless Apple decides to block the app because it duplicates the iBookstore--let's hope that doesn't happen!)