Hi guy please check out my video showing you the snapshot 12w24a!
The snapshot includes:

Additions

You can now use o /publisho to open your single-player game for LAN friends to join. This is still very much work in progress, so it lacks some necessary settings such as what game mode your friends will get, and if they should be able to use cheats or not. Also, the o /publisho command is temporary, you cano t even access it if you haveno t enabled cheats
The Ender Chest has been changed to have an inventory per player and not per world. Also, knocking down the chest will break it into 8 obsidian, unless you have Silk Touch.
The texture pack folder button now works on Mac.
A lot of smaller changes and fixes.
Bug fixes:
Fixed bug when Minecraft doesn't save your progress, stops generating chunks and freezes all the mobs.
Fixed the Enderdragon not dealing any damage to the player after it has been hit once
Fixed explosions not pushing back players
Fixed buckets not picking up or placing water within the spawn protection
Fixed water-movement sound

Please Diamond so more people can see! And Please Check out my mod and Texture pack!!!!!