I use one tablespoon fine grind per 6oz of water. That's just about right for me. I drink it black. I don't like the 2T/6oz water folk who dump cream and sugar in the coffee. Nobody drinks coffee black like that unless it's espresso. Maybe Stefano, not me.
I like to break this out at dinner parties:
http://www.hariousa.com/conavacuumepot.html