Blizzard is reopening character creation on 36 realms after determining that they were stable enough that the influx of population wouldn't significantly change the player experience. They aren't reopening all servers, but this is a big step towards that. I checked earlier this morning and they weren't open yet, but hopefully by now they are avaliable to create characters.

You can find the forum post here.

Full list of realms after the jump.

Aggramar Archimonde Argent Dawn Arthas Azgalor Bleeding Hollow Bloodhoof Mannoroth Gorefiend

Burning Blade Burning Legion Dalaran Durotan Earthen Ring Elune Eonar Eredar Gilneas

Kargath Khadgar Laughing Skull Lightning's Blade Llane Lothar Magtheridon Mal'Ganis Malygos

Medivh Shadow Moon Shattered Hand Skullcrusher Stormrage Thunderhorn Thunderlord Warsong Zul'jin