Here's an interesting option for group editing. Send the link to the public workspace that you're given and other people can go there and edit your work.
Choose a color (or more) and it loads images with that color scheme from Flickr. Great if you're teaching color and making collages or if you just want color coordinated wallpaper
"Show Document is a Net Meeting platform for instantaneous and spontaneous online meetings where people can work together on the same document at the same time. All the Net Meeting collaborative services can be used to work together at the same time. The web meeting platform offers the following interactive services: * Share Documents *Shared Editor *Share Google Maps *File Sharing *Share Viewing a Web Page *Share to Mobile *Interactive Whiteboard *Share YouTube