I was wondering is it possible to play guildwars on the same server if one person is in europe and another is in the USA before i go out and buy it for no reason :P
The GW world is all one world- there's no separation between servers. However, if their home world is set to Europe and yours is set to America, you'll have to meet up via the International Districts. To go to the international districts just go to the drop-down menu at the upper-left of your screen when you're in a town or outpost, and the bottom option should be to travel to the International Districts.