I am working on a foursquare application where I am depending on user-generated data.
Say for instance that I want to categorize places with rare tap beers on the menu, then I would like users to write in their "What are you up to"-comment something like #RareBeer Pabst Blue Ribbon, and be able to catch that comment.
I understand that my OAuthed user has to befriend users to be able to see this, but how do I proceed from there?