By default, open the link in a new tab/window, a la Google Reader. And I agree, some kind of standard syndication is key: Atom, RSS, etc. That said, it's got a

By default, open the link in a new tab/window, a la Google Reader. And I agree, some kind of standard syndication is key: Atom, RSS, etc. That said, it's got a decent hit rate of showing me links I'm interested in so far.