How to host audio chatsoftware and what sort

Hi peeps,

I am looking for free software to use for audio chats, simular to , lets say, TeamSpeak and sorts.
I dont want to use it for gaming or so, just for chatting to friends.

Now, I am wondering several things;

  • Is there any software like that, wich can be hosted on dreamhost?
  • Are there any known problems or conflicts?
  • I dont want that 1-click install phone program thats available, I want it to be a room wich people can join without trouble.

Thnx in advance