Alternatives to Adsense/Infolinks for Transit Info webapp?

[David]

Title says it all! My app is extremely simple and meant to only show departures at one transit stop. Adsense and Infolinks both rejected the app. Any other ideas for ad networks I can use to monetize it? Thanks for any ideas you have of alternative ad networks for me to look into. – by hq overview thebiglebrewski – –