Oh god, I got so excited when I first saw this. Unfortunately I have to wait a few more weeks for it to be released.
I'm not sure how the portal world will work, I'm guessing it will be very helpful to use but once your inside it's going to be very dangerous. Nice idea, balancing risk with reward. With that I can't help but wonder what the new mobs will be? Maybe little demonic creatures or huge beasts.
Scarier depths. This should be fun. Hopefully the farther down you go, the better the rewards become. Guess that means we will be getting new ores or maybe some of the new mobs will drop good items to use at the surface? Love the flint and steel to reignite torches, much more realistic and gives F&S a new use. I hope lanterns are brighter than torches.
Looks like Notch has also revealed the use for the fishing rod he implemented in the last update. Who's ready to go fishin'? Haha.
Scare players online? No clue how that's going to work, maybe give admins special new features. I hope we can use a knife on a pumpkin and go into a sort of carving screen where we can customize our jack o lantern, that would be boss.
A new watch tells you when it's safe to come out of the caves? The hell. I guess that means the new objective for this world is to go underground, set up a base, and survive in the dark... spooky.