So let's say you just made this awesome Pinterest board for apartment decorations and want your future-roommate to see the Joker print that's going in the hallway. More importantly, you're curious if she feels the same way about it as you. Well, now neither of you have to leave the app or website to find out because Pinterest has just introduced a messaging feature to the service. As TechCrunch points out, it's an extension of the Send a Pin feature from last year, and it should make collaborating much easier. It's also a natural step toward the project-board app becoming a fully fleshed-out social network. We doubt it'll make your personal style any more palatable to the person that's splitting the bills with you, though.