I have started to accumulate a few decent miles with some airlines. In the past, I've merely used miles to reduce the cost - choose a flight, apply points, voila.
However, I was wondering if there was a way to specify your miles into a search (like kayak) - say, enter, x Delta miles, x Qantas miles, x BA miles, and hit go and see what gets found with the 'discount' applied?
Just a random idea that I wondered if it might exist.