Now that Minecraft is a full game, the actual version 1.8 will be released soon. Until then we have Snapshot 14w02c.
Many new additions are going to be added into the ever expanding game. Ones that are being talked about are 3 new types of stone, and Slime Blocks. They also are fixing many features already implemented, such as changes in Enchanting, Anvil Repairing, and Adventure Mode. Jeb (Minecraft's current leader and co-creator), is also adding small things such as the ability to stack Doors up to 64, and being able to craft Chiseled and Mossy Stone Bricks. They're also working on making Minecraft run smoother and have better preformance by changing up the coding, which is always nice.
It's currently unknown when the full update will come out, but die hard Minecraft fans will be waiting for it daily.