No world transfers as of yet. But here are some theories and possible solutions if all your friends are on a particular server.
1. All friends can get on a lower population server and start. This would mean that friends that have already dedicated some time will lose their character level and etc.
2. You can try using the buddy pass system. It's built supposedly to handle a friend coming onto the world same world, supposedly. In theory this may work.
3. You can wait till the regular retail date of 9/30/10 and maybe they will open up the server for oncoming people that may want to play with friends on a particular server. This may hold true with the PS3 release also. Again this is a theory and it MAY or may not work.
Honestly getting just 4 friends on Figaro was a pain in the **** for everyone so we just decided on one of the lower servers. The population is going to be diverse no matter which server you choose really. If the server is closed that means JP and EU have to choose different servers as well. Thus they have the same dilemma as everyone else.
It's not who we are, but what we do that define us. - Batman Begins