Wildildlife.

Not doom per se, but they write 18 minute tracks with large doom sections. The other bits sound like a cross between Battles and Boris.

Burning Witch
Earth
Goatsnake
Witch
Thorr's Hammer

ultra-slow low-end funeral-drone. Well sick.

http://www.riseaboverecords.com/prodview.asp?prodId=238

Anything on Rise Above is worth checking, especially Electric Wizard and Orange Goblin.

The Goslings - Occasion
Husband and wife duo making music that sounds like the end of the world through a load of distortion pedals

also listening to:
Corrupted - Se Hace Por Los Suenos Asesinos
Graves At Sea - Documents Of Grief

Abominable Iron Sloth
Acid King
Bloody Panda
Bongripper
Burning Witch
Capricorns
Cathedral
Electric Wizard
Goatsnake
Harvey Milk (not Doom per-se, but close)
Iron Monkey
Jex Thoth
Middian
Mouth of the Architect
The Obsessed
OM
Omega Massif
Overmars
Pale Divine
Reverend Bizarre
The River
Rosetta
Serpentcult
Sleep
Winters
Witchcraft
YOB

http://www.myspace.com/iddqd

Ramesses
Jesu
High on Fire
Om
Neurosis
Sleep
Sunn O)))

Ocean. You need their album Here Where Nothing Grows.

And I second whoever said Burning Witch.

Not strictly doom as they touch bases with several other genres including stoner rock and post metal, and they sound amazing.

My Dying Bride and Black Sabbath, hey sabbath's doom ain"t it? "Children Of The Gravre"?

Reefer Sutherland has a good list for sure.

I've never heard Nadja but there is a woman it that band.

Earth is supposed to be great although I haven't heard that one either.

My Wife loves Type O Negative and the whole family is going to see them in june- Type O is considered gothadelic but Peter Steel's voice is ultra baritone smoky doomladen sounding- not quite "smog encrusted doom" but pretty awesome still. : )

http://drownedinsound.com/articles/2269634

That's the old one.

ARE FUCKING ACE.