A new web site of interest

I was recently alerted to a web site that might solve two of the vexing problems of booking airline tickets: 1) trying to make sure you don't miss the sales (especially the ones that last 24 hours; and 2) forgetting to check to see if the price has gone down since you bought the ticket (in which case you should get a voucher or a refund. The web site is www.yapta.com. Unfortunately they don't yet have the ability to work with a macintosh computer so I have no first hand experience. But if the web site lives up to its own publiciti, it should be extremely useful.--Marian