Skyscanner.com has been doing this for a few years for european flights. It looks like they've expanded into the US and have also de-centralized this feature of their website: http://www.skyscanner.com/news/articles/2010/06/006690-searc...

When I lived in Germany, I used to plug in a month, see the cheapest flights, and just go somewhere for the weekend.

Neat. Reminds me of something I built in college: http://www.youtube.com/watch?v=Lfh9upwZWA0

I must admit that mine was quite a bit simpler.

They're labeling them "pirates" so that the MPAA and the RIAA will get on the case. Those guys are relentless.

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