I figured it was a one-time event though just to celebrate the big 1.0 release.
I think if there are plans to make it an annual event though, Mojang needs to hand the running over to some company or group that has a few years experience running cons.
"The way I see it, every life is a pile of good things and bad things. The good things don't always soften the bad things. But vice versa, the bad things don't necessarily spoil the good things or make them unimportant."