Warsong Gulch
Warsong Gulch is one of the few OOC zones, filled with vendors and other important npcs.
Warsong Lumber Mill
The Lumber Mill is home to Mok'tar, talk to him once you are level 80 for your Silver Tokens and gold. Also present here are vendors for D1-3, and T1-2. Out front you can find Auctioneer O'reely and Dealer Tajaad, the tabard vendor. A portal to the Arathi Basin Tradeskill Area, and the Arathi Farmland mount vendors are present in the flag room, and portals to the main Horde and Pact cities, as well as Dalaran, are in the tunnel below the mill.
Silverwing Hold
The Hold houses Tier 4-6 vendors as well as a portal to the Arathi Basin Tradeskill Area. Down below in the tunnel are portals to the main Alliance cities, as well as Shattrath.
The Outskirts
Along the outskirts you will find a training area, with brawlers to fight to train melee combat skills, and dummies for training long range combat skills, as well as vendors providing low-cost fast-hitting weapons for faster training, and a vendor for class skills.
More on the Warsong side in the southwest building resides Krovnar, an orc who can provide totems to budding shamans. Opposite that is the clothing shop; here you can find things ranging from headgear to offhand items, to shirts and pants for every RP situation!
On the sentinel side you will find a bank, complete with banker and guild vault, in the north-eastern building. Opposite that you will find the tier frills shop; here you can get T7, boots, belt and bracers, and gladiator gear.