Minecraft 1.5 patch has been released.
* Weather (rain, snow, thunder)
* Statistics
* Achievements
* Detector rail
* Booster rail
* Performance improvements
More statistics and achievements will be added over time as we develop the game. They’re only stored locally at the moment, but we’ll slowly be rolling out online storing of achievements over time.
Get yours here

oh man… booster rails are right in minecraft now. what will come of this craziness?