Teamspeak or the like

Sorry to all for starting a new thread. I did use the search option but couldn't find an answer to my question.
Was just wondering if there is a IP address for teamspeak that people are using at the moment. Would be good to speak to people who are flying.
Does anyone know how to use the speech option on Steam? I can't seem to get it going and I have no idea if anyone is even using it.
Again, sorry for the new thread.
Oh, and one more thing, if you don't mind, how do you use the message option ingame? I think I closed the window and now can't bring it back up again.