• Double-click items to fill the stack up as much as possible
  
• Drag item stacks around to divide them up over the dragged-over slots
  
• Drag item stacks around with the right mouse button to place one of that stack in each dragged-over slot, if that slot is not occupied already
  
• Shift double click items in a crafting area to place all items in the inventory
  
• Shift double click an item stack to move all other item stacks of that kind to that part of the inventory
  
• Pressing Q while the mouse is over an item in the inventory or a container to drop it"
  

• Redstone Comparator - If input A (the back) is stronger than input B (either side), the comparator will act as a gate. Or if you right click it, it acts as a repeater.
  
• Hopper - Looks like a funnel, and that's how it works. If an item is dropped into it, it gets stored in one of its 5 slots. If it is connected to another storing block (chest, brewing stand, furnace, NOT enderchest) it will be put into it. If it is powered with a current, it will not move the items. Also, if it is UNDER a storage block, items will "leak" from it as if dropped. It seems like it would be a non-solid block, but actually isn't. You can place rails over it, and if a minecart with chest goes over it, an item will be taken out.
  
• Trap Chests - Emit a redstone signal when opened. Items can be stored like normal chests. The more users use it (up to 15), the stronger the signal.
  
• Chests - These have been around before, as you hopefully know, but now emit a signal that equates to how much stuff is in it.
  
• Weighted Pressure Plates - The more items on them, the stronger the signal. They come in two varieties--heavy and light.
  
• Dropper - Think of a dispenser that doesn't shoot. You now have a dropper. They can be placed facing ALL 6 WAYS, including up and down! This can be very useful. You can also place a dropper in front of a storage block and when powered, will place it into it.
  
• Redstone block - Just like a block of diamond, gold, or iron, a redstone block is used to compress/store redstone. But it has interesting properties--it constantly emits a redstone output. Kinda cool because it acts as a power source even when pushed by a piston.
  
• Nether Quartz - Mined from the nether, smelted like iron, and used in the comparator and daylight sensor. Also craftable into decorative blocks, such as PILLARS, chiseled blocks, and stairs and slabs.
  
• Daylight sensor - Emits a redstone output that is the same as the level of DAYlight. Is not affected by other light sources.
  
• Dispensers - Have been amped up. You can make them face up or down now too.They also can equip players with armor from up to 1 block away. They can use bone meal on plants and saplings. A more evil side--they can place and activate TNT and create fire if a flint and steel is in it. Flint and steel will be depleted normally from inside of it.
  

New Rails & carts!

• Detector Rail - Improved so if it powers a comparator hooked up to it, it makes an output that equates to the amount of items in that particular cart
  
• Activator Rail - With redstone power, you can activate Minecarts with TNT.
  
• Minecart with TNT - Put TNT on a minecart, and when activated, will blow up immediately when it runs out of rails, so basically ignores TNT's regular timing effect. Interestingly, the faster it is going, the more violent the explosion.
  
• Minecart with Spawner - Not sure if it will be added with the update, so...uh...not much to say, ecept that it's a minecart with a spawner in it. There's also a planned Minecart with Dispenser.
  
• Minecart with Hopper - Works like a hopper, will be emptied when it passes over a hopper with a rail over it. It can pick up items that it "runs over."
  
• Rails - Possibly a new rail(s). Also the possibily of minecarts being linked when powered by a minecart with furnace. Mobs now will not cross tracks unless pursuing the player. (FINALLY)
  

Monsters get a Makeover

• Skeletons - Shoot from 5 blocks farther away, can shoot faster when their target is closer, and scale to your difficulty.
  
• Zombies (zahmbes :3 ) - They tell their zombie friends when you're close, they get stronger (more aggressive) the more you hurt them, and if they get set on fire, they can set YOU on fire! Of course, they also scale to the difficulty.
  

More Random Update-y Stuff

• Nether - Nether Quartz ore is randomly placed all over the place (supposedly to encourage exploration)
  
• Abandoned Mineshaft - Items no longer spawn in chests, but in minecarts with chests.
  
• Bone Meal - This really disappointed me when I read it--instead of growing plants all the way, they only grow it one stage up. :( At least they now emit green particles when used.
  
• Snow!! You can take your snow cover thingy (available in creative AND in survival, via crafting snow blocks), and stack them on top of each other.