They said they would announce them, when you load up the game and choose a server, theres the names. I know it sucks, but if this is the biggest problem in this game for you, then im sorry. My biggest problem with this game is thats its too addictive and makes me stay up later and want to play all the time.
Yep, i'm not really sure why they are keeping the server names secret. To what gain? It sure would be easier for guilds to start on the same server.
Otherwise, i expect most major guilds to have a website, and worst case scenario they make a sticky post with their server name as soon as servers up. For smaller guilds with no website, do the same thing except in an IRC chan with servername as MOTD. Its better than nothing.