Currently, we have a forum set up at http://www.83rdclan.net/phpBB. I'll try to get a website setup at a domain sometime in the near future.
For now, we only need mappers and coders. If there is also a demand for them, we might need map modelers as well. If you are interested in this mod and want to contribute, email me at merc248 AT gmail DOT com, or you can PM me on these boards or sign up on the forums and post on there about it. I myself am trying to learn Hammer 2, and I have modeled things such as weapons in the past with Maya (so please... don't think I'm just a mere "idea man". 
)
For those who do not want to commit completely to the team but still want to contribute, keep in mind that the common level design will heavily reflect the Eastern European architecture presented in City 17.
Basically, the game is cooperative multiplayer where the players find themselves defending against an endless assault of Combine forces. The game is based around the insurrection during Half-Life 2's single player game which pits the citizens of City 17 against the various Combine forces (Citizen Protection, Striders, etc.). Perhaps in either the first release or subsequent releases, the guerilla fighters will find themselves in varying situations where they will fight against other enemies, such as ant lions, zombies, etc. The central aim would be to implement the Combine AI in multiplayer, however.
There will be two classes to choose from: medic and defender. The medic will have the ability to heal as well as revive any nearby teammates (before the reinforcement timer runs down at least), but will not be able to carry the pulse rifle and the rocket launcher. The defender will be able to carry every weapon but of course cannot heal or revive.
The Combine forces will always equal to double or triple the amount (or whatever ratio the server admins chooses) of players in the game. They will head for an objective, while the players will of course have to keep them away from this objective. In order to do this, the players can employ objects within the level in order to serve as barriers and as cover against hostile fire. There will also be ways to impede their progress by way of using makeshift draw bridges (like in single player), etc.
Because the players are guerilla fighters, they will always have a constant shortage of ammunition; this will encourage frequent "ammo" runs to pickup weapons from the dead bodies and carry them to a commonly agreed weapon cache.
