At http://www.zumyn.com you can build you own mosaic of photos. I participated with Laurie Marshall of Unity Through Creativity (unitythroughcreativity.net), in a project to bring more awareness to autism through constructing a Singing Tree for Autism using zumyn software. So it looks like it is not only a tool for your own photo mosaic, it is also a wonderful tool for an interactive creative project. See Marshall’s project at http://autismtree.zumyn.com.
