On xbox(I think)- Hitting circle brings up the menu, hit right on D-pad for items, left spells, Up skills. Items and spells can be browsed in categorized Multi-leveled lists, and equipping them is as easy as hitting r1 or r2(for left or right hand). Hitting up when not in the main menu brings up the quick menu.
Oblivions speechcraft wheel is out, replaced by "Fallout" style dialogue choices.
Staffs, bows, and two handed swords can be used to block, though they are more effectively used bashing instead of blocking.
There's foxes that hunt rabbits.(so wolves and foxes).
Ice Form- shout, Encases enemies in a block of ice, temporarily paralysing them.
Whirlwind Sprint- Shout, Let's players blast rapidly in one direction. Ideal for aiming distance attacks At fleeing enemies, Or getting in close to bash them.
Storm Call- High level Shout, "The sky darkens in a vortex of Swirling black clouds, it begins to rain heavily, as lighting strikes down, hitting the dragon(they are fighting)."
Charge shouts by holding R2 (I assume xbox 360, they also mention a circle button at some point, not related to shouts, so does xbox have a circle?)
Giants are 12ft tall.
Also, Oblivion contained 40,000 lines of dialogue(I didn't know this) and Skyrim has 60,000(did know)
Main quest can be completed anywhere from 20-30 hours.
It will take 300 hours to see everything the game has to offer.
Edit:Cleaned up/added more information from the Magazine.
This is everything I Personally haven't seen, or stuff I knew but with a bit more information I hadn't known.