The following items are my loot/quest notes from having run a single shammy to L70 and planning on getting my other 3x shammies up there (they're not quite outlands yet, but never too soon to plan). I thought it might be useful as a start point for other 4/5x Shammy players. It's not comprehensive by any stretch of the imagination.

Boylston



Head:
[Shamanistic Helmet of Second Sight] - Shadowmoon Valley quest Line, L67.

Amulet:
[Natasha's Ember Necklace] - Big quest chain in Blade's Edge. Can start at L65...

Shoulders:
[Tidefury Shoulderguards] - Normal SH

Back:
[Spell-slinger's Protector] - Nagrand quest "Bring me the Egg" startable at L64...
[Cloak of Woven Energy] - Netherstorm quest L68.
[Skywitch's Drape] - Rep grind from dailies

Chest:
[Stormstrike Vest] - L58 Hellfire chain starting with Boiling Blood! High priority!

Wrist:
[Clefthoof Wristguards] - L64 quest in Nagrand (Clefthoof Mastery)
[Rugged Mountain Bracers] - L65 Quest Reward
[Primal Surge Bracers] - Normal Black Morass
11k Honor Vindicator's Mail Bracers - Really good first candidate for honor farming.

Hands:
[Verdant Handwraps] - L61 Hellfire "Natural Remedies" quest. High priority!
[Tidefury Gauntlets] - Normal Steamvaults
[Earth Mantle Handwraps] - Normal Steamvaults
[Stormfront Gauntlets] - Normal Old Hillsbrad

Waist:
[Girdle of the Gale Storm] - Normal Blood Furnace
[Cord of the Ring] - L64 Quest item. Murkblood Corrupters in Nagrand

Legs:
[Haramad's Linked Chain Pantaloons] - Mana Tombs Quest (L64)
[Warcaster's Scaled Leggings] - L64 Murkblood Idolatry quest in Nagrand.

Boots:
[Earthbreaker's Greaves] - L64 Quest chain in Auchie, starts with "I see Dead Draeni"

Rings:
[Burning Blade Cultist Band] - L64 Quest Chain Reward
[Band of the Guardian] - Quest reward from CoT chain (L66)
[Dreamcrystal Band] - BoE, Auction Houseable, made from Apexis Shards.

Trinket:
[Vengeance of the Illidari] - Cruel's Intentions at L58.
Several other random trinkets that you'll get through questing...

Weapon:
[Earthcaller's Mace] - Quest reward from Hellfire/Mag'har Post. L60 Reward
[Talbuk Sticker] - L64 Talbuk Mastery quest in Nagrand

Shield:
[Landslide Buckler] - L58 Hellfire Quest Bonechewer Blood