Appitalism.com is an interesting new site that combines elements of the iTunes store, Amazon customer reviews, and tight links with social media. This might actually turn out to be a winner, as many of the "shopping" sites tend to lack enough traffic to produce reliable reviews, and in my experience, many listed products on those sites have no reviews. Finally, a lot of those shopping sites are basically just link farms for advertisers. Appitalism puts the control in the hands of users, rather than advertisers, and so I think it is likely the site will get more and better reviews overall.