[nostrademons]

Isn't that basically Amazon? They patented one-click ordering and shipping back in the late 90s, and now they've brought many smaller suppliers under their umbrella (that's the "X new and Y used from $PRICE_MUCH_LOWER_THAN_MSRP) blurb next to the product. They even sorta do the cashback thing - many credit cards offer "5% cashback on purchases at Amazon.com!"

[maverick2]

Good point. Amazon is kind of like it. But searching for a product on amazon is like searching of some info on wikipedia.

However, Google search spans a across all of web.

So, we do not have something that spans across all sites to hunt for the best airline ticket. Taking into account all of the preferences.