EDIT 3: They are open again! I myself am not reporting anymore due to some rest I need, but I hope all is a safe journey from here.
EDIT 2: They have closed the servers currently for maintenance. They should resume at 9 PM PST / 12 AM EST tonight.
IMPORTANT EDIT: It currently seems that there are two major problems. The first you'll notice is a fixed resolution window for GunZ 2. Despite changing graphics settings, the only thing graphical wise you can adjust is the quality. Second, you can't actually start a room, or join a room for that matter it seems. We'll keep you posted as things adjust through this process of their Steam launch. Original post below.
So, what are you waiting for? Go get Steam at www.steampowered.com
, and download it from the steam client! The game will take about 2 gigs of space on your harddrive, so make sure you have room for it!
See y'all in there!