HighlifeTTU and lazertester, Minecraft modders, have created a Central Lobby System. The full 3-D server browser lobby lets you walk around and explore when choosing a server to join, taking the game even closer to becoming a full MMO.
The mod is essentially a Minecraft world itself that allows players to connect to other worlds but also includes a relaxation lounge, zoned-off PVP brawling areas, other players in the halls talking to each other and reading server description as well as swimming pools. The mod helps bring players together intuitively into a bigger community.
Minecraft sold 15 million downloads in 2012, with 4.2 million of those in December alone.