#2 - Dec. 1, 2011, 5:18 a.m.
Cross-Realm Real-ID BG Grouping is Now Avail.
#12 - Dec. 1, 2011, 5:14 p.m.
I have made sure that this is in the 4.3 patch notes: http://us.battle.net/wow/en/blog/3964563/43_Hour_of_Twilight_Patch_Notes-12_1_2011#blog
A few reminders about this --
You're going to see the limitations as you do in Looking-For-Dungeon and Looking-For-Raid.
You can't invite Real-ID friends to a raid.
If you have Real-ID friends in your group, you can't convert to a raid.