That's fine.  The reviews should be on your site, not some other site.<p>Maybe mimic Amazon's review system?  Get all the reviews from iTunes and augment them by letting people say helpful/not helpful, and then showing the most helpful highest rated review and the most helpful lowest rated review, etc.<p>Basically create a landing page for each app and then optimize the )(*!@# out of it.<p>The reason I think this is the right approach in your case (vs. Google) is because your universe is very contained.  There's a single, canonical database of applications you need to index (for iPhone apps).  Google has to index the whole web, so creating verticalized sub-products is hard to do without knowing what's important and what isn't.<p>Google is obviously moving in that direction, with maps, reviews, music, video, etc.<p>This might be different for Android vs. iPhone.  I'm not very familiar with the Android ecosystem.