I just was playing on the new snapshot 1.8! it is awesome! check it out!

look down for information:

Mobs and entitys:
Bunnies/Rabbits,
Endermite,
Guardians,
Banners/Flags,
Armor Stands,
Mob head (now dropped by mobs),

Building Blocks:
Granite/polished,
Diorite/ploished,
Andesite/polished,
Wet Sponge,
Prismarine/Dark,
Prismarine Bricks,
Sea Lantern,
Sandstone (now red also),
Fences (Different Wood),
Doors (Different Wood),
Beacons (Now in colors!)
Food:
Mutton (Raw),
Mutton (Cooked),
Rabbit (Raw),
Rabbit (Cooked),
Rabbit Stew,

Materials and Brewing:
Paramarine Shard,
Paramarine Crystals,
Rabbit Hide,
Rabbit Foot (For Jump Boost)
Potion Of Leaping (FINALLY!)

Biomes and Structures:
Water Temples,
Allows to customize Biomes,

Now You Are Wondering What Are Those Werid Mobs?

Rabbit:
a tameable animal that is awesome for Brewing and Food.

Guardian:
a huge Creature that will be in water and protect the Water Temple.

Endermite:
Kind of like silverfish.... but, ender?!?!