I have found four of the guys who give out these quests so far. they are located at
In Elddar Grove, at the base of the big tree, Wander Greencoast
In NQ, at the base of the Citadel steps, Guard Williamson
In NQ, outside the Temple of Life, Caretaker Nogfizzle
In SQ, in the lobby of the mage tower, Pupil Adept Wazzlefop
You have to be level eleven to start these quests.
The down side of guild xp is if no one does these quests the guild starts loosing xp

bril