I gather that there are a whole bunch of social aspects to the game that are planned, but we don't have visibility of yet, but as I was playing last night, kissing and mooning random strangers, I started thinking about how could you encourage players to interact with each other more.
There are a bunch of people in the game that I know already from elsewhere on the Internet, but there are a whole lot more who I don't know. Chatting in these forums outside of the game is always a good way to get to know a few people, but it would be nice if the game itself encouraged interactions that otherwise just wouldn't happen. I don't know about anyone else, but I always find it a bit weird striking up a random conversation with a total stranger, but if the game actually required you to go and talk to people you didn't already know, it would be a great ice-breaker.
I was thinking that some of the quests could pair two random players together - anyone who happens to be online at the time - and require some kind of cooperation between the two in order to achieve their goal. They could be teleported to a new location to do this, or perhaps they have to start by actually finding each other in the world.