Maintenance for the week of June 5:
• [IN PROGRESS] PC/Mac: NA and EU megaservers for patch maintenance – June 5, 2:00AM EDT (6:00 UTC) - 8:00AM EDT (12:00 UTC)
· Xbox: NA and EU megaservers for maintenance – June 7, 6:00AM EDT (10:00 UTC) - 9:00AM EDT (13:00 UTC)
• PlayStation®: NA and EU megaservers for maintenance – June 7, 6:00AM EDT (10:00 UTC) - 9:00AM EDT (13:00 UTC)
Guilds can be cross faction, however when the guild is created you still need to designate a main faction and while I am not sure entirely what this choice dictates, I do believe that it affects claiming resources in pvp but this is speculation as I haven't tested it. Also, while you can have people from other alliances in your guild it will still not allow to group with them in dungeons or pvp.