Terraria 1.1 Trailer & Info!

There are a few different links you can check out on Terraria Online forum and Wiki for patch 1.1.

Developer Redigit pops a few screenshot teasers along with a ton of information you'd be interested in. Right at the start of the topic you'll come across this:

"There are 39 new monsters, including 4 brand new bosses. We've got three new NPCs, all waiting to be rescued. And for the loot obsessed, there are 222 new items, including 4 sets of armor, and 21 accessories." - Redigit

Moderator Darkas-Pony drops some patch notes and links specifically about new things to come! Patch notes below courtesy of GermanJesus.


New items

A total of 222 new items
Hallowed Seeds(planted to create the Hallowed Biome)
Obtained by destroying Demon Altars

• New Ores:

Cobalt Ore
Mythril Ore
Adamantite Ore

• New Blocks

Corrupt Sand
Purified Sand
Pearlstone Blocks
Mythril Brick
Cobalt Brick

• New Sets/Tiers

Set of Cobalt items:
Cobalt Armor (re-introduction).
Cobalt Drill
Cobalt Chainsaw
Cobalt Sword
Cobalt Glaive
Cobalt Repeater
Set of Mythril items:
Mythril Armor
Mythril Drill
Mythril Repeater (Ranged Weapon)
Mythril Sword
Mythril Halberd
Set of Adamantite items:
Adamantite Armor
Adamantite Glaive
Adamantite Drill
Adamantite Chainsaw
Adamantite Crossbow (?)
Set of white/gold items:
Excalibur
Pwnhammer (likely a placeholder name)
Corresponding Armor

• New Weapons:

Dao of Pow
Ying Yang Flail
Buster Sword
Clockwork Assault Rifle (fires in short bursts)
A MOTHER F-IN’ FLAMETHROWER!!!
Shotgun
Megashark
What looks like a Grenade Launcher

• Holy Water.

Also has a purple variant.

• At least five new accessories.
• 21 new Accessories in total

Light blue-colored boots
Light blue-colored teardrop-shaped item.
Some sort of rectangular device which appears to have a screen.
Orange-colored snorkeling headgear/ computer
Light blue-colored shield with a pattern on it
A Cape
A Medallion, from the looks of it.
A shell
A Holy Bottle

• Torches can be colored when combined with gems

Amethyst/Purple Torch
Topaz/Yellow Torch
Sapphire/Blue Torch
Emerald/Green Torch
Ruby/Red Torch
Diamond/White Torch

• A Bell
• A Ruler

Creates a grid for easier building.

• New clothing:

Overalls
Leather Shoes

• New Grappling Hook

Fires very fast and has a long reach, but only one hook

• Statues

Armor Stands
Demon/Gargoyle Statue
Griffin Statue
Angel Statue
Bunny Statue
Bird Statue
Slime Statue
Bat Statue
Heart Statue
Corrupter Statue
Star Statue

• Magical Harp

Used as a magic weapon
Silver version and Gold Version

• Two new scepters/rods

Rainbow Rod
Ice Rod
Creates Platforms

• New back walls

Thin vertical wooden beam
Stone Background with wooden plank supports
Glass Walls

• Wings
• Wiring-related items

Wrench
Allows you to see wires so they don’t ugly up your stuff 24/7
Wires
Pliers
Levers
Switches
Pressure pads
Pumps
Allow for transport of liquids.

• Circular stone block
• Some sort of crystal in the underground.
• Ammuntion

Crystal Bullet
Holy Arrow
Cursed Bullet

• More Books

Cursed Flames
Crystal Storm

• A golden Throwing Knife
• A New Tier of Healing potions
• Soul of Night
• Soul of Flight
• A red oven/stove/furnace
• Another crafting table-like furniture piece

New additions 

• New Biomes:

Hallowed Biome (anti-corruption biome)
Underground Hallowed Biome
Hallowed Desert
Corruption can spread further
Corrupted Deserts
Corrupted Jungles
Corrupted Oceans
Deep Corruption

• An Orb of Light Upgrade(Looks like a fairy)

Can be multiple colors

• A new lighting engine:

Allows for colored light.
Torches give off a warmer glow.
Lighting is now much smoother, and the overall brightness has been increased.

• New Feature: Capable of destroying Demon Altars
• New Feature: You can use items that you are holding with your mouse instead of just dropping it.
• New Hotkeys:

Torch/Glowstick Hotkey
Context Sensitive Tool Key (uses tool suited for whatever you are moused over)
Lighting Mode Hotkey (White/Color /Retro/Trippy)

• Smoother Transitions

Smoother transitions between background walls
Smoother transitions between certain blocks (wood and dirt, stone brick and dirt)

• New background vista for the surface.

Pine forest w/ mountains
Sand dunes
Will utilize parallax

• Random Character option
• New Mechanic- Wiring

Looks like it can spawn creatures from statues.

• New Cloud and Sun sprites
• FEMALE CHARACTER SPRITES

All, or at least close to all, armors will have female variations.
Requires a new character.

• NPC Housing In-Game Help

Tells if a building is suitable for an NPC
Allows you to designate the housing of NPCs

• Certain Items have prefixes, which grant them special buffs

An NPC, presumably the Goblin Scientist, will help edit these buffs

• Items now tell their critical chance and their knockback in the tooltips.
• New Rarity levels

Purple.
Gray

• Changes to the max stacks of some items
• Traps will be pre-generated underground, adding some interesting challenge.
• Underground abandoned hovels
• NPCs have names.
• Something to cause you to turn into a water breathing reptile whilst underwater.

New NPCs

• A Total of 39 new monsters
• New Mob: Wraith (200 HP)
• New Mob: Giant purple floaty death hammer of doom and death
• New Mob: Clingers (300 HP)
• New Mob: Armored Skeleton (140 HP)
• New Mob: Giant Bat (200 HP)
• New Mob: Corrupt Slime (splits similar to Mother Slimes)
• New Mob: Corrupter (400 HP)
• New Mob: Unicorn
• New Mob: Werewolf(could be a vanity set)
• New Mob: Mummy
• New Mob: Long, Wingless Dragon.
• New Mob: Bird(looks like a seagull)
• New Mob: Skeletal Archer
• New Mob: Gastropod
• New Mob: Possessed Armor
• New Mob: Pixie
• New Mob: Angler Fish
• New Mob: The Hungry
• New Mob: Illuminant Slime
• New Mob: Mother Jungle Slime.
• "At least" one new boss.

Wall of Flesh (will be in Hell)
8000 Health
Harder versions of the pre-existing bosses
Skeletron Prime
30,000 HP
Four Arms
The Destroyer
80,000 HP
Doesn’t split
4 new bosses in total.
More Mini-Bosses (stated indirectly in the IRC)

• New NPC characters (All must be rescued)

Found in the dungeon, and can be injured whilst there
A Wizard
An Engineer
A Goblin
New Music

• Hallowed Biome theme
• Underground Hallowed Biome theme
• Underground Corruption
• 2nd Boss theme
• 3rd Boss theme

Bug Fixes

• Certain ways around the death-coin penalty have been fixed

Process for initiating Hard Mode

• You must summon and defeat the Wall of Flesh to start Hard Mode
• May require the Guide Voodoo Doll
• World will get MUCH more difficult.