Apple’s App Store recently hit the 10,000 application mark, and while the store does a pretty good job at turning up impressive new applications through its Top App lists and on banners that scatter the store, most users are only exposed to a tiny fraction of the applications that are available. Now Y Combinator startup AdPinion has leveraged the technology behind its advertising voting engine to create a recommendation service for iPhone apps called Appalanche, hoping to surface the gems that are most appealing to users and might otherwise go unnoticed. To use the web app, visit this site from your browser.