Updated the list as best as I could with the information provided so far(helps when people format the information correctly).
US Guilds (Live)
Server, PVE/PVP, Faction, Guild name, Guild level, Contact person
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Area 52 - PVE - Horde - [url=http://us.battle.net/wow/en/guild/area-52/Dead_and_Pissed/]Dead and Pissed[/url] - 25 - All.
Barthilas - PVP - Horde - [url=http://us.battle.net/wow/en/guild/barthilas/Dark_Passenger_II/]Dark Passenger II[/url] - 25 - All.
Burning Blade - PvP - Horde - [url=http://us.battle.net/wow/en/guild/burning-blade/Medusa_Cascade/]Medusa Cascade[/url] - 25 - All.
Caelestrasz - PVE - Horde - [url=http://us.battle.net/wow/en/guild/caelestrasz/WarcraftPets/]WarcraftPets[/url] - 8 - Balut.
Darkspear - PvP - Alliance - [url=http://us.battle.net/wow/en/guild/darkspear/J%C3%B9dici%C3%B9m/]Jùdiciùm[/url] - 25 - Vettuschola/Cryoseism.
Darrowmere - PvE - Horde - [url=http://us.battle.net/wow/en/guild/darrowmere/judicium/]Judicium[/url] - 25 - Banehand/Lappilli.
Draenor - PvE - Alliance - [url=http://us.battle.net/wow/en/guild/draenor/Happy_Funk_Band/]Happy Funk Band[/url] - 25 - Jalad/Ephemera/Iddy.
Kil'Jaeden - PvE - Horde - [url=http://us.battle.net/wow/en/guild/kiljaeden/The_Gamblers/]The Gamblers[/url] - 25 - ADumbledore/Lear.
Madoran - PVE - Horde - [url=http://us.battle.net/wow/en/guild/madoran/Magical_Menagerie/]Magical Menagerie[/url] - 25 - All.
Madoran - PVE - Horde - [url=http://us.battle.net/wow/en/guild/madoran/WarcraftPets/]WarcraftPets[/url] - 25 - All.
Madoran - PVE - Horde - [url=http://us.battle.net/wow/en/guild/madoran/Pet_Peeves/]Pet Peeves[/url] - 25 - All.
Madoran - PVE - Alliance - [url=http://us.battle.net/wow/en/guild/madoran/Allies_of_Warcraftpets/]Allies of WarcraftPets[/url] - 6 - All.
Moon Guard - RP - Horde - [url=http://us.battle.net/wow/en/guild/moon-guard/gotta_catch_em_all/]Gotta Catch Em All[/url] - 2 - LuniLuna#1102.
Silvermoon - PvE - Alliance - [url=http://us.battle.net/wow/en/guild/silvermoon/SinsOfMen/]SinsOfMen[/url] - 17 - Dolfinwrld.
Silver Hand - RP - Horde - [url=http://us.battle.net/wow/en/guild/silver-hand/The_Ancients_Misbehaving/]The Ancients Misbehaving[/url] - 25 - All.
Stormrage - PVE - Alliance - [url=http://us.battle.net/wow/en/guild/stormrage/WarcraftPets/]WarcraftPets[/url] - 12 - All.
Warsong - PvP - Alliance - [url=http://us.battle.net/wow/en/guild/warsong/The_Storm_of_Azeroth/]The Storm of Azeroth[/url] - 25 - Kalishnu#1781.
Wyrmrest Accord - RP - [url=http://us.battle.net/wow/en/guild/wyrmrest-accord/Stormwind_Kennel_Club/]Stormwind Kennel Club[/url] - 16 - Helenheals/Deaddivine/Koorda/Tungal.
Unable To Locate:
Dragonmaw - PVE - Horde - WarcraftPets - 1 - Sarpanions.
Moon Guard - RP - Alliance - Gotta Catch Them All - 1 - LuniLuna#1102.
Proudmore - PVE - Alliance - WarcraftPets - 11 - All.
Thorium Brotherhood - RP - Alliance - Triad Fellowship - 19 - Whitesage/Rivian/Darkelm/Hairydotter/Dracaena/Edelweis.
EU Guilds (Live)
Server, PVE/PvP, Faction, Guild Name, Guild Level, Contact person
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Lightbringer - PVE - Alliance - [url=http://eu.battle.net/wow/en/guild/lightbringer/Et_lux_in_tenebris_lucet/]Et Lux in Tenebris Lucet[/url] - 25 - Jadax.
Silvermoon - PVE - Alliance - [url=http://eu.battle.net/wow/en/guild/silvermoon/WarcraftPets/]WarcraftPets[/url] - 25 - All.
The Sha'tar - PVE - Horde - [url=http://eu.battle.net/wow/en/guild/the-shatar/Tribal/]Tribal[/url] - 25 - All.
US Guilds (PTR)
Server, PVE/PvP, Faction, Guild Name, Guild Level, Contact person
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Anasterian - PVE - Horde - Warcraftpets - 2 - All.
Anasterian - PVE - Alliance - Allies of Warcraftpets - 1 - All.
Lost Isles - PVE - Horde - Warcraft Pets - ?? - All
Lost Isles - PVE - Alliance - Allies of Warcraft Pets - ?? - All
I've been creating toons on other servers to try and assist with my wifes collection (http://www.warcraftpets.com/community/forum/viewtopic.php?t=10575). Which is why I went to some effort to help with this Topic
.