According to wowhead there are seperate quests for each factions in Utgarde Keep: http://www.wowhead.com/quest=29763 / http://www.wowhead.com/quest=11262
Assuming they work the same as signet of argus for 19s that you can complete on both factions.
Leave a link to your armory and whenever you are geared for instance pvp or world pvp / pve along with your highest ilvl for instance pvp.
I dont check XPOFF daily so this will be updated whenever I decide to log in.
Warrior
Paladin
Hunter
Korgahll - 157 ilvl
Rogue
Stabbo - 159 ilvl...
What twink guilds lol? AD only has one twink guild thats remotely active and even then they are just the same 5 people playing in the 60 guild.
Your not going to merge with another guild due to there not being any.