Zeyla and I talked about some stuff in PM's about the guild situation...
If the Republic side of Hoss doesn't have enough people to fully start up a guild (or if you'd like more people to play with), my "main" account is with a guild called Templars of Xionics (XCS) (currently, we have 23 people in the guild....all with per-ordered accounts). This is guild I was with throughout my time in SWG and we are re-forming it in this game (our allies and adversaries are from the Shadowfire server from SWG as well, so there will be a ton of people who know each other). The group is very laid back with the average age of everyone being in their mid-30's. Some want to PvP, some will want to raid and some will be playing to be with friends and do things when they have time to be online. If you look up the guild it will say hardcore, but don't worry about that. If you want a Republic side home, you'll have one....in the event enough Hoss people join XCS and want to splinter off and form Hoss on that server, please feel free to do so.
Zeyla also has some old friends he mentioned to me that will also have a guild in game, so maybe that can potentially be another home for Republic side of Hoss as well.
For the Sith side, I agree that Phank might be a good choice. Zeyla and I also talked about any XCS members that wish to play Sith side may want to look into Phank so both sides would have a home for whatever side they choose to play on, but w/o talking to the leaders of Phank....I do not want to speak to XCS about the potential for that until that discussion happens.