Found this in the latest Jeff Strain article..
"What about the new guild halls and guild members who do not get faction. Will they be able to join the new guildhalls, too? Will non-faction guilds be able to upgrade their guildhalls?
There will be four new guildhalls available in Factions. These are available to all guilds, and access to them does not require participation in Alliance Battles or Competitive Missions.
In addition, guilds will be able to buy services for their guild halls, including:
Crafting Material Trader
Rare Material Trader
Priest of Balthazar
looks like guild halls will get spiced up just as we hoped =D