Web/Android/iOS: Pocket has always been a bookmarking service, but they're experimenting with a new way to find articles in a public beta, which is available right now to check out.
The beta includes a new recommendations tab where you'll find popular articles that other people are saving. It's still in early beta, so they're looking for feedback about how it works and what types of articles should be included. That said, it works pretty well for finding popular articles when you've already read everything on your reading list. You can check out the beta for your device of choice at the link below.