WHAT'S AMAZON'S TIME WORTH? "You expect it to happen to fund-strapped start-ups such as Twitter. But Amazon? The e-commerce site went down this afternoon around 1:30 EDT and stayed down for at least an hour. Attempts to access Amazon.com were met with the following message: 'Http/1.1 Service Unavailable.' It's hard to know exactly how many dollars a minute Amazon loses in sales for every moment its site is down, but simple math pegs it at about $1.8 million an hour …"