Was in such a hurry I forgot to post the link. Derp
http://sv.twitch.tv/realnotch/b/293537610
Edit: The creative mode looks amazing. Will be so helpful in the creative world.
Also, "The oceans are reaaaally big now, with some small islands scattered. There are also huuuge continents."
Edit 2: Really big randomly generated dungeons, like the caves now. He found an abandoned mineshaft with rails in it.
Edit 3: He says 1.8 is so big, they might just release it in steps instead of doing everything at once
Edit 4: Love the new biomes, he's showing a huge plains biome. So flat. I like.
Edit 5: Rivers also usually divide biomes, so there is different biomes on either side. Awesome.
Edit 6: Endermen die when they go in water. WATER EVERYTHING!