In the WoW General Discussion forum there is a post from Eyonix suggesting good North American realms to roll on!

For players just beginning their adventures in World of Warcraft or veterans looking for an exciting new beginning, there's no need to wait for new realms to release. The realms listed below are an ideal place to begin anew!

Andorhal
Chromaggus
Executus
Haomarush
Muradin
Scilla
Uldaman
Ysera
Ysondre
Zuluhed

Read the rest of the thread by following the link!