Due to population differences between some of the highest and lowest populated PvP realms, the following Free Character Migration will be available April 9th to 15th:

From: Frostmane, Grim Batol, Magtheridon, Twilight's Hammer
To: Bladefist, Dragonmaw, Spinebreaker

From: Molten Core
To: Stonemaul

Please note that the migration may be closed at any time should a destination realm's population rise too high.

FAQ: http://www.wow-europe.com/en/info/faq/charactermove.html