I played Saturday Night, our game had 3 people, plus Rob Hiensoo after he returned from dinner.
I could say more, butI just dont want to be wrong because I was partially delerious from lack of sleep. My players and Kieth can attest that even though I was pumped to play, a few times during the game I litterally blacked out.
WarForged:
They are rare and very cool. They cannot have dragonmarks.
They cannot wear armor.
If they want armor they must take a feat at first level and are required to stick with it. Yes this feat gives them arcane failure.
Yes Warforged can be wizards.
Warforged have no need for sleep or food or drink, though its been suggested to take a page from Futerama and require them to drink oil or alcahol. (Mostly as a joke. Wizards would never allow the second one anyway).
Craft Armor~~~~~ing can be used to "heal" Warforged as the Heal skill is on humanoids.
Artificers are the only ones who can build warforged.
Artificers are the only ones who can cast spells, or infusions, that heal Warforged effectivly.
Normal healing potions (and maybe spells, i think) only work at half effictiveness for Warforged.
You can have as many diffrent types of Warforged as you have humanoids. It depends on how they were constructed. From huge tanks, to light and fast infiltration/assassin units.
Warforged were first created 30 years ago and MOST are 1-5 years old.
I think that covers just about everything that was asked or mentioned during the game i played in regards to Warforged.