Many services offering this such as http://www.mobileautoresponder.com. I was thinking a "Beta test latest iphone games" type angle. Promote weekly top games via autoresponders, and when a new one comes on the affiliate network do a broadcast to all subscribers. I'm sure someone on here is doing this, care to share Any information?
This is considered "App Discovery" and most networks don't allow it. Like any App install, it needs to result in paying players and app discovery is about as good as incentivized installs. You could probably do this with offers that allow incentive.