Notch was also recently interviewed by Rock, Paper, Shotgun, describing the game’s genesis and roadmap:
RPS: What’s surprised you the most about how people have approached the game?
Persson: The number of videos on YouTube is pretty stunning. There are more movies about Minecraft than about Quake on there, and trying to understand why is very interesting. It’s probably related to people wanting to show off what they do. It would be really interesting to add in-game video recording capabilities.