Just noticed Kayak Buzz feature on Kayak’s site. The concept looks similar to Travelocity Dream Maps, but done nicely with Google maps. This could be useful for MR or just finding general fare info for city pairs.
http://www.kayak.com/h/buzz/flights?code=NYC
I played around a little. It says the fares shown are from searches people have performed within the last 3 days. Well, try it out and if you find other cool usage, please share.
Thanks
Nick