There are around 70-90 people playing at a given time lately, the server is compatible with the .91 version of Infantry right now, squads are not 100% functional which is fine right now.
The current zones available are: Chamberts Moon, Twin Peaks, Hockey Zone and Arena.
Warzone Alpha will be available when there are roughly 200 people playing at any given time. Yes this community is already larger than SOE's fallen one, that is the intended outcome. Infantry will be restored to its former glory, take part in it.
Here are some screenshots from Chamberts Moon that I just took.
What is Infantry?
Infantry is a massive futuristic multiplayer online wargame that weaves the best elements of realtime strategy, 3d shooters and down and out GungHo into an exciting, racey and immensely flexible game engine that is capable of producing a variety of grossly different gametypes but all equally enjoyable.
The game features a classing system with a wide array of weapons (all perfectly viable, mind you).
Chamberts Moon is a KOTH style game with teams of up to 6, both public and private on a large map. Vehicles and alien classes are also available in this zone, with a multitude of weapons in comparison to Twin Peaks.
Twin Peaks is a two team, four flag CTF zone, two Hill Flags and 2 randomly placed flags. Grab the flags and take them home to your base, which can be anywhere on the map and outfitted with various turrets and mines. Hold all the flags for 90 seconds and win.
These two zones are the most popular and its best to make a new alias for each classed character you make so you may actually progress.