If you are working on a LAN with other Macs running OS X 10.6 and above, or working off a common group on an OS X server, you might want to take a look at Kickoff Collaboration tool for small groups – Kickoff:

Kickoff now fully uses the new and shiny 10.7 SDK to benefit even more from the goodness provided by Lion. Including: the fullscreen mode. You can now cover every pixel of your screen with Kickoff’s sexiness Kickoff obviously stays compatible with Snow Leopard but without those Lion-specific features… …Kickoff’s meeting room is the heart of the app, the place where everyone shares stuff and discusses the project. We thought we should make it more prominent so we’ve integrated it right in the main window. It’s still possible to detach it via the preferences but we really encourage you to stick with the one-window layout for maximum awesomeness We’ve also improved the sharing features with, for example, the ability to send a full folder right in the chat.