I am sorry to see Amazon buy Zappos. Not because I have bought a lot of shoes at Zappos (still liked this as a title for the post though), but here are three reasons: First, I felt that Zappos could be a real competitor to Amazon for online retail. And I love competition. It is great not just for customers but also for suppliers. Second, Zappos was an IPO-able company based on size and apparently profitability. It takes IPOs to build confidence in the financial markets. IPOs beget IPOs. Now w...