Here's what I'd like: for some ambitious web engineer to figure out a way to aggregate a list of all stores that offer affiliate discounts, and then what affiliate to use.

For example, I often try eBates and Fatcash to find discounts on online purchases. I also try coupon sites like retailmenot to see what I can get. But with airline partner sites, there's a whole other world of potential affiliate bonuses out there, and each one is different. That's a lot more sites.

I recently spent a lot of money at ImprovementDirect, only to find afterward that I could have gotten up to 5 miles per dollar on United. Painful.

Is there any site out there that does this? Anyone interested?

Of course, I'm not sure how such a website would make any money . . .