I am sure we all know what guild housing is and how it operates in other games, such as LotRO or Guild Wars, but let's explore this aspect in the Star Wars setting. There are two ways in which I could see guild housing being implemented, if it is at all. Either it could be designed as a literal house or building on an already designed planet, such as Korriban or Coruscant, or it could be put on a separate, just for guild halls planet. But not only that, perhaps it would much more convenient to allow guild housing upon ships, instead of planet(s).

If guild housing is decided upon and allowed to proceed on planets, it would make sense to set up a different sector of the city just for these halls (a.k.a. instancing). A person would simply walk or perhaps teleport to the part of the city that allows instancing into their hall and then zone in as if it were a dungeon. The reason why is that if guild halls were allowed to take up residence in various buildings throughout the city, it could cause confusion for those whom are leveling and end up causing far more lag issues. Once these guild halls are set up, they could have the option of buying, fighting, bribing for control of certain parts of the city. If one guild controlled one part of a city, perhaps they would get the added benefit of a reduction in the cost of items or repairs. But let's go one step further. If such a system is set up, it would only make sense for one guild to want to compete for control of an area over another guild. So, Guild vs. Guild PvP could develop. It would have to be an opt-in system, not in any way required, unless you wish to compete for sectors of the city. The rewards could be obvious control of a sector, but perhaps taking money or items from the losing guild.
But enough of GvG PvP, what would be the purpose of a guild hall? It would allow for a members of the guild to socialize in an RPG element first and foremost, but it could serve as a place to get ready to board the guild's transport ship to go off to the next raid. But it could also serve as a place to repair, buy items from the auction house, PvP, etc. The list goes on and on.
Besides a planet, the other option for a guild hall is a ship. This option is more personally exciting for me and I think that it is more to the Star Wars theme than a planet. So, instead of buying sectors of a city, perhaps the guild can compete for sectors of space, each with different materials or added bonuses of for possessing it. But not only that, perhaps the guild starts off with a smaller ship and is allowed to upgrade their ship to the size of a Star Destroyer or something of the like. They could compete in battles with one or more guilds for control of not only their sectors of space, but maybe even their own ships.
Just the thought of such a system is exciting for me, so what about all of you? What are your thoughts of guild housing and how it should be done, if at all?