Amazon has announced a whole raft of Kindle e-readers and tablets. But the interesting ones to me were the tablets. There are 3 of them, the Kindle Fire 8.9″ HD with 4G, the Kindle Fire 8.9″ HD, and the 7″ Kindle Fire HD. The bigger Kindle Fire HDs compete directly with the iPad while the smaller competes directly with the Google Nexus 7 and the much rumored iPad Mini. The battle of the big three is heating up even more. What’s interesting is that while Amazon started with books, Google with ads, and Apple with songs, pretty much all of them are now selling the same stuff: books, ads, songs, movies, etc. But Amazon has a huge leg up: shopping. Google and Apple would do well to get into that, maybe by buying eBay?