Patch 1.6: Trapdoors, Maps and Wild Grass!
Entertaining Minecraft Patch 1.6 video by the YogsCast. In the video the demonstrate Trapdoors, Maps and WildGrass. It talks about Mushrooms and mushroom farms. The demonstrate the benefits of a trap door - by having a house with a the only entrance is a trap door.
Maps can be drawn by the user. One neat thing about Maps is that you can actually walk off the map, just like in real life.