I'm working on technology related to this problem. I'm interested in hearing anyone's thoughts (ideas are cheap, right?) about the best way to curate the app store at scale.

The biggest challenge seems to be that there is a very limited amount of information available. Marketing text, category, and maybe rating (Though I think you have to violate Apple's ToS and scrape to get that.) Apple already offers free-text search, but I think few use it.

Most approaches so far have gone for trying to create a social network around app discovery, which seems like a lost cause to me (how many people are going to join such a network?) I could be wrong though...