Time for a new snapshot! One big difference this time is that you don?t need the server jar to play single-player. Also,
1. Villagers will trade items (they are cheap bastards, though!)
2. Added a currency item
3. A few minor terrain changes
4. A new useful block/item (requires obsidian)
5. Added a /seed command for showing the map seed
6. Added sandstone stairs
7. A lot of smaller changes and fixes
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INSTALL INSTRUCTIONS
Windows-
1. Type %appdata% in the search bar
2. .minecraft/bin
3. Drag the minecraft.jar file into the /bin folder
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MAC -
1. goto Finder/User/Library/Application Support/minecraft
2. FOLLOW STEPS 2-3 above.