Seattle airfare prediction company Farecast is no longer in its beta, or testing, period starting today. The company also said it's introducing some new features, including an alert system to tell users when certain airfares drop.

Farecast also disclosed the results of an audit of its airfare predictions. The company hired Navigant Consulting to analyze a random sample of 44,000 predictions made in the first three months of the year. Navigant said the predictions had a 74.5 percent accuracy rate.

I did a far less comprehensive survey last fall and found an accuracy rate of about 61 percent.