Virtual World (Score 1)

Why not use something like a Project Wonderland https://lg3d-wonderland.dev.java.net/? It gives you application sharing (VNC on win32 and X on Linux, etc). Also gives you 3D audio, chat, an avatar, a whiteboard and even the ability to phone into the world from a landline (hardware allowing). You can customize the area, add photos using Flickr http://blogs.sun.com/wonderland/entry/flickr_friday. Worth considering IMHO.