#1 - Jan. 8, 2014, 3:03 p.m.
Blizzard Post
The following Free Character Migrations are scheduled to be available until 14 January, 2014. They are all open for both factions:

PvE Realms
Draenor
-> Magtheridon, Wildhammer, Kilrogg
Silvermoon -> Magtheridon, Wildhammer, Kilrogg

PvP Realms
Kazzak
-> The Maelstrom, Grim Batol, Tarren Mill*, Ravencrest*
Outland -> The Maelstrom, Grim Batol, Tarren Mill*, Ravencrest*
Ragnaros -> The Maelstrom, Grim Batol, Tarren Mill* Ravencrest*
Stormscale -> The Maelstrom, Grim Batol, Tarren Mill* Ravencrest*
Sylvanas -> The Maelstrom, Grim Batol, Tarren Mill* Ravencrest*
Twisting Nether -> The Maelstrom, Grim Batol, Tarren Mill* Ravencrest*, Frostmane*

*FCMs to Tarren Mill, Ravencrest, and Frostmane are unlikely to be available after 14 January, 2014.

If you wish to discuss an FCM for a specific realm, the dedicated discussion threads are linked above.

Please note that FCMs are opened based on realm population tracking and analysis, not by request. If you’re looking for a specific migration (from realm A to realm B), you should in most cases use the Character Transfer service. Although we will try to avoid doing so without giving notice in advance, these FCMs may be closed before the scheduled date.

Character Transfers (CT)
All realms follow the regular CT rules, found here:
http://eu.blizzard.com/support/article.xml?locale=en_GB&articleId=20416

Guild Transfers
Although Free Guild Master Realm Transfers are not possible at this time, the Free Character Migration will allow you to retain your guild membership and reputation, provided that the guild master completes a Guild Master Realm Transfer first and the faction remains the same as that of the source realm.