Both Neil and I blogged about the new Seattle startup Farecast, whch allows you to watch the price history, predictions and buy/wait recommendations of flights. What had been up was the beta site with just two cities available. But today the company’s airfare prediction technology went nation-wide with flights departing from 55 US cities that are now available for viewing. The site also offers RSS feeds for automatically tracking fares and predictions over time. Pretty sweet. eager to give it a whirl.