For you guys on high population servers it looks like character moves has became reality in World of Warcraft.
Right now, the only server that can move is Arthas to Nathrezim but the others in the following list will enable transfer in the near future.
Warsong (PvP) -> ??? - To be announced
Bleeding Hollow (PvP) -> ??? - To be announced
Illidan (PvP) -> ??? - To be announced
Blackrock (PvP) -> ??? - To be announced
Stormreaver (PvP) -> ??? - To be announced
Shattered Hand (PvP) -> ??? - To be announced
Mannoroth (PvP) -> ??? - To be announced
Blackhand (PvE) -> ??? - To be announced
Whisperwind (PvE) -> ??? - To be announced
If you want to transfer a character from Arthas to Nathrezim, first read the FAQ then go here.
This is a very good news for the people who are tired of the lag and the queues on high population servers.