Basically all the info we know at this point about the two new races in Cataclysm consolidated into one spot. If info isn't officially confirmed I include a brief explanation as to why I put it there. Will try to update as more info is released, also if anything important is left out please post and I will add.
Goblins
Faction Name:Bilgewater Cartel
Racial Leader: Trade Prince Maldy- rumored
Important NPCs: Doc Zapnozzle- Resuscitates you back to life in starting zone, Sassy Hardhearted- "Your Former Executive Assistant" rumors hint she may become the faction leader after the starting zone.
Capital: May get back Undermine, may be given a "district" of pre existing horde city, or a capital in Azshara.
Starting Zone: Kezan and Shipwreck Shore, Lost Isles
Racial Mount: Goblin "Kart"- presumed
Language: Orcish, Goblin
Height:2'7"-3'3"
Weight: 40 lb. average
Maturity Age: 20
Maximum Lifespan: 75-93 (many live only around 20 years due to explosive accidents during apprenticeships.)
Skin Color: Various shades of green, from dark to yellow green
Alignment: True Neutral
Religion: None known, possibly worshipers of the Light due to goblin priests being available
Architecture: See various Goblin settlements already in wow
Playable Classes: Death knight, Hunter, Mage, Priest, Rogue, Shaman, Warlock, Warrior
Planned Racial Abilities
Rocket Jump (2 min cooldown)
Activates your rocket belt to jump forward.
Rocket Barrage (2 min cooldown, shared with Rocket Jump)
Launches your belt rockets at an enemy, dealing X-Y fire damage. (24-30 at level 1; 1654-2020 at level 80)
Time is Money (passive)
Cash in on a 1% increase to attack and casting speed.
Best Deals Anywhere (passive)
Always receive the best discount regardless of faction standing.
Pack Hobgoblin (30 min cooldown)
Calls in your personal servant, allowing you bank access for 1 min.
Better Living through Chemistry (passive)
Alchemy skill increased by 15 (and you gain bonuses for healing/mana potions you made; 25% more mana/hp from potions).
Worgen
Faction Name: Gilneas
Racial Leader: King Genn Greymane
Important NPCs: Lord Godfrey- quest giver who wants to kill the player at first due to the worgen curse, Liam Greymane- the prince of Gilneas, Krennan Aranas- Gilnean royal alchemist and inventor of the worgen cure
Capital: Gilneas City- lorewise this is true at the moment, most likely will be stationed in a SW district
Starting Zone: Duskhaven, Gilneas
Racial Mount: Boar/Wolf type hybrid- presumed, the "barghest" concept art is heavily debated. Boar/wolf is what I got from the pic.
Language: Common, Worgen/Gilnean
Height: 6'-7'3"
Weight: 275 lb.
Maturity Age: 16
Maximum Lifespan: 85-130 -human lifespan
Fur Color: Single tone from dark black to light grey, dull blue, and dull brown
Alignment: Chaotic Good- presumed
Religion: Worshipers of the Light- presumed
Architecture: Similar to SW humans, with a more gothic feel.
Playable Classes: Death knight, Druid, Hunter, Mage, Priest, Rogue, Warlock, Warrior
Planned Racial Abilities
Darkflight (3 min cooldown)
Activates your true form, increasing movement speed by 70% for 10 sec.
Viciousness (passive)
Increases all damage done by 1%.
Aberration (passive)
Reduces the duration of all Curses and Diseases used against you by 15%.
Flayer (passive)
Skinning skill increased by 15, removes the requirement of having a skinning knife and increases skinning speed.
Two Forms (1.5 sec cooldown)
Turn into your currently inactive form.
Sources: wowwiki and the Cataclysm released artwork/screenshots and videos.