Administrating a Mac Server in a Windows Environment

We have been a Windows / Linux environment for a long time. We finally convinced folks to allow us to get a Mac Server for doing some iPhone development. The server is up and running and is accessed remotely using TightVNC Viewer. A small group of us would like to collaborate on the development. It seems using VNC limits us to one user at a time. Is there any Windows solution which would allow us to login and work simultaneously?

Thanks!
Bob

How about WebDAV? (Distributed Authoring & Versioning) Utlilize a WebDAV share for collaboration.

I assume the VNC thing you mentioned was more directed to a terminal services type of setup. There is Aqua Connect for OS X server (Term Services for Mac really) that will allow you to connect to multiple TTY sessions on the server, but that still doesn't really give you the collaboration abilities you mentioned either.

What is the goal really?