Some SEO Suggestions, if this is related to something you are distributing. Look into somehow implementing Rich Snippets . Also, Schema.org 
The idea is good but having application aggregators such as download.cnet.com, softpedia.com and others in the result means a lot of duplicate entries.
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One piece of feedback I've received is that people prefer to use a native mobile app if one is available, so the plan is to include links to app stores on the app pages. Unfortunately, none of the app stores offer APIs for retrieving apps based on keywords.
Are you saying it can't search on keywords? I find that sort of shocking.
Edit: so yes, I was wrong to say "none", but Apple has its own set of issues making it difficult to do
We're not there with Android yet, though.