#1 - Aug. 13, 2014, 12:16 p.m.
Blizzard Post
The following Free Character Migrations are scheduled to be available until 2 September, 2014. They are all open for both factions:

PvP Realms
Outland -> Grim Batol, Karazhan
Draenor -> Kilrogg, Wildhammer

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.

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.