No worries, we'll have plenty of space, and i think that the guild... is international but EU based... actually, am going to have to check up on that. Think a US guild was a "might happen" last time i heard anything.
But on that note, guilds are also cross realm so you can join from any server (although we'll need your account name for that) however the guild is going to be based in Desolation for World vs World so.... yeah.
Check back with the forums when the next BWE is announced, will post a thread about it then.
In the meantime, if you do want to join the PCG guild on Guild Wars 1, am sure someone can help you one. not sure how active it is, but there are a few people around the place helping to get players get their rewards