A new NPC has been added to our Guild Hall: Guild Commendation Trader Stalwart Ben. He's located to the left of the main staircase in the central plaza of the Guild Hall (under the double flag). You'll find him standing beside his twin brother, Favor Broker Ronald Lefleur.
Before this unannounced addition, players had to travel to the Guild Initiative Headquarters in Lion's Arch to access this merchant. He offers items for purchase with Guild Commendations: minis, banners, ascended accessories, guild backpacks, exotic sentinel inscriptions and insignia, as well as the original set of Guild Weapons. A full list of what is offered is on the GW2 Wiki .