This is quite significant as some of the bigger ad networks focus almost exclusively on these kind of ad units and have reasonable market shares (Airpush and Le

This is quite significant as some of the bigger ad networks focus almost exclusively on these kind of ad units and have reasonable market shares (Airpush and Leadbolt are good examples): http://www.appbrain.com/stats/libraries/ad http://www.appbrain.com/stats/libraries/ad