as Per the SWTOR web site, all guilds are locked until game launch:

“All guilds are currently locked as we prepare them for deployment into Star Wars ™: The Old Republic ™.

During this period, guilds may not be altered in any way. This includes:

• Creating / disbanding guilds
• Adding / removing guild members
• Promoting / Demoting guild members
• Adding / removing Allies and Adversaries
• Changing guild’s server type, time zone, and language preference.”

If you’ve tried to join us but the attempt failed, don’t be discouraged! Please try again after (possibly) 12/15 (for pre-ordered players) or 12/20 (the offical release date) when the guilds are schduled to go live again. Thank you!