Dang, somebody stole my idea

I've been wanting to do this for years... and here it is, done awesomely, and dripping with Ajax-y goodness:

Farecast

This might be the most awesome useful site I've seen since Google (or maybe just since GMail). Maybe that's just because I wanted to make it myself. Go forth, and find yourself some really good flights, without taking a couple hours to do comparisons yourself.