http://www.the-digital-reader.com/2012/03/20/bowker-amazon-dominates-the-world-ebook-market/
(2) They are catching up with Wal-Mart (and Wal-Mart is desperately trying to catch up with them):
http://www.bloomberg.com/news/2012-03-20/wal-mart-gears-up-online-as-customers-defect-to-amazon.html
(3) They have acquired a robot army:
http://money.cnn.com/2012/03/20/technology/amazon-kiva-robots/