I’ve taken the time to watch the Diablo 3 HD 20-minute gameplay video three times now, hitting spacebar as often as possible to pause without causing my brain some serious tremors. Hit the jump for information on bags, skill descriptions, enemy and item lists, and much, much more!

My personal notes follow the lists.

Barbarian Equipment:
Barbarian left: Gaff. Axe. 51.6 dmg/second.
Barbarian right: Spitze. Axe. 56.4dmg/second.

Heavy Axe of Storms: 27.6 dmg/second, +1-42 lightning.
Double Axe of Frost: 23.4 dmg/second. +25-27 cold dmg.
Annihilator Maul of Immolation - 109.6dmg/second, 2 handed. 107-167 dmg, +25-27 Fire Dmg.

Gauntlets
Plate leggings
Gothic Helm
Plated Greaves
Gothic Plate
Plated Pauldrons

Boss:
Thousand Pounder. Gluttony Incarnate.
Siegebreaker Assault Beast. Living Siege Engine of Hell. 1-Hit kill: Grab, bite head. Decapitate.

Barbarian Skills:
Battle Cry
Rank: 5/10
Shouts out a warning, increasing defence of all nearby party members. (And Barbarian)
Radius: 15 feet
Stamina: 35
Additional defense: 200%
Duration: 300 seconds.

Hammer of Ancients
Rank: 4/5
A massive attack that has increased chance to critically hit.
Stamina: 16
Deal 225% weapon damage plus an additional 14 physical damage.
+25% chance to critical hit.

Furious Charge
Rank: 1/1
Charge directly at an enemy, smashing everything in the way.
Current level: 1
Fury: 20
Primary Damage: 110%
Secondary Damage: 100%
Range: 85 feet.

Whirlwind
Rank: 1/20
Swirl in a cyclone, delivering attacks to everything in his path.
Current Level: 1
Fury: 1
Hits for 25% of weapon damage
Next Level: 2
Fury: 1
Hits for 30% of weapon damage.

Witchdoctor Skills
Horrify
Rank: 3/5
A spectral mask that horrifies all enemies in proximity, causing them to run in fear.
Mana cost: 10
Radius: 20
Fear Duration: 1-2 seconds
Mask Duration: 5

Wall of Zombies
Rank: 4/5
Zombies erupt from the earth to attack your enemies.
Current level: 4
Zombies attack for 15 damage.
Next Level: 5
Zombies attack for 15 damage.

Items:
Throwing knife
Short bow
Minor energy rune
Elixir of Vitality I
Chipped Star Topaz
Inferior Leather Gloves
Scroll of Identify
Inferior Quilted Pants
Quilted Pants
Ancient Medallion
Short Staff
Small Bag - probably coincides with the 4 bag icons in the inventory screen
Minor Health Potion
Chest Armor
Two-Handed Axe. Purple item.
Sash
Inferior Quilted Pants
Minor Power Rune
Minor Lethality Rune
Quilted Pants
Leather Gloves
Elixir of Willpower I
Short Staff
Amulet

Enemies:
Ghoul
Grotesque - spawns ~20 Lamprey
Dark Berserker - Hammers. Have attack that makes hammer look like it is on fire. - Berserker gets hammer stuck in ground upon miss.
Dark Summoner - summons Dark Demons
Dark Demon
Wraith
Ghostly Orb - spawns Wraith
Zombie
Wretched Dead
Walking Corpse
Skeletal Archer
Skeletal Shieldmar
Dark Vessel - transforms into Activated Vessel
Beast
Skeletal Summoner
Scavenger
MoonClan Warrior
Moonclan Shaman
Wood Wraith

Notes:
-It looks like they removed the repair necessity. You don’t see repair status when mousing over the items in the inventory.
-Minimap is in the top-right corner now, instead of the middle of the screen. Tab does not bring up the map, either.
-Ambient fog in the tomb - keeps moving.
-Health/Mana keeps moving, or the graphic does.
-Water effects constantly. Creatures Barbarian is fighting don’t appear to upset the water, though. did Blizzard find a way to make water look good and take less graphical power? I hope so.
-Barbarian interrupts water.
-Draw distance - silhouettes of the creatures in the top of the screen climbing up the wall - black shapes.
-Pieces of the enemies fly off the bridge.
-Barbarian portrait has arrows for rotation under it.
-Stylized inventory space. Bags/gold in bottom-right. 4 bags per character now?
-Background: Watch the multiple levels while you play. You can see up/down the entire area.
-Barbarian freezes an enemy mid-attack. Can you combine this with Whirlwind and dual-frost weapons?
-Passive or active skill: Bottom left corner, hot button #4 on skillbar.
-Skillbar: Diablo (health) vs Tyrael (mana)?
-4:19 - enemy corpse still twitches when it is dead. Looks like even Blizzard can’t get rid of this!
-Bookcases are interactive, but actually look like they’re in the background.
-Cloth drapes blow in the background of the chest room. Mouse-pointer changes on chest - cog-wheel.
-Items auto-equip on equipmentless berserker.
-Cog-wheel on Mouse pointer means there is an interactive object. Ladder, chest.
-On ground: Mutilated corpse.
-Barbarian name: Sparker
-Character: Deckard Cain.
-Thought-bubble pops up when you mouse-over a character you can talk to.
-Character name: archer
-FURY? Specific to Barbarian?
-Barbarian hits quest-necessary door: Doesn’t show damage. When he hits other items, it does.
-Keeps boss health bar on top-mid of screen, regardless of mouse position.
-Walk over gold: automatic pickup
-11:48 - Character: Leah. Mentioned in Barbarian’s speech to D.C.
-Background: BUNNIES
Speculation: Pick up health-orb, nearby allies also get health if your health is full/near-full? - visible in the final boss fight of the video, when the Male Witchdoctor picks up an orb.