The Longest Day Checklist ( this is a printable pdf version – Tamer checklist )
Eastern Kingdoms (Alliance) or Kalimdor (Horde) note though: both Winterspring and Deadwind pass must be done by both factions.
Eastern Kingdoms – Alliance
Elwynn Forest: Julia Stevens
Westfall: Old MacDonald
Cape of Stranglethorn: Bill Buckler
Hinterlands: David Kosse
Eastern Plaguelands: Deiza Plaguehorn
Searing Gorge: Kortas Darkhammer
Swamp of Sorrows: Everessa
Burning Steppes: Durin Darkhammer
Deadwind Pass: Grand Master Lydia Accoste (Horde must do this tamer)
Redridge Mountains: Lindsay
Duskwood: Eric Davidson
Northern Stranglethorn: Steven Lisbane
Kalimdor (Horde)
Winterspring: Grand Master Trixxy
Mount Hyjal: Brok
Durotar: Zunta
Northern Barrens: Dagra the Fierce
Desolace: Merda Stronghoof
Dustwallow Marsh: Grazzle the Great
Stonetalon Mountains: Zonya the Sadist
Southern Barrens: Cassandra Kaboom
Thousand Needles: Kela Grimtotem
Felwood: Zoltan
Feralas: Traitor Gluk
Moonglade: Elena Flutterfly
Ashenvale: Analynn
Winterspring: Stone Cold Trixxy
Outland (Both factions)
Hellfire Peninsula: Nicki Tinytech
Zangarmarsh: Ras’an
Shattrath: Morulu The Elder
Nagrand: Narrok
Shadowmoon Valley: Grand Master Antari
Northrend (Both factions)
Howling Fjord: Beegle Blastfuse
Dragonblight: Okrut Dragonwaste
Icecrown: Grand Master Payne
Crystalsong Forest: Nearly Headless Jacob
Zul’drak: Gutretch
Cataclysm (Both factions)
Deepholm: Bordin Steadyfist
Twilight Highlands: Goz Banefury
Uldum: Grand Master Obalis
Panderia (Both factions)
Jade Forest: Grand Master Hyuna, Whispering Pandaren Spirit
Beasts of Fable: Book I, Book II, Book III,
Townlong Steppes: Burning Pandaren Spirit, Grand Master Zusshi
Krasarang Wilds: Grand Master Mo’ruk
Dread Wastes: Grand Master Shu, Flowing Pandaren Spirit
Valley of the Four Winds: Grand Master Nishi
Vale of Eternal Blossoms: Thundering Pandaren Spirit, Grand Master Aki
Kun’Lai Summit: Grand Master Yon
Z is for Zeirah 