New Update adds Fireworks

The next update (1.4.6) will come out before Christmas and the main addition will be fireworks. This way you can celebrate new years eve in minecraft as well ;).

You can download the snapshot 12w49a, that contains the changes here:

Client: http://assets.minecraft.net/12w49a/minecraft.jar

Server: http://assets.minecraft.net/12w49a/minecraft_server.jar