I'm working in ITS at the University of Colorado - Boulder, and need some kind of solution to a problem in our department. We work in a very mixed and mobile environment (Four ThinkPads a PB and an iBook) and need to keep track of changes in documents, PowerPoint being the most important. Currently, we all work on separate copies of the file, and then hope that we have the current version of it on the laptop that we are presenting with. I'm sure that there is a software solution (or even a physical solution) for us, but I don't currently know what that solution would be. I am going to be meeting with my boss tomorrow to discuss some of our options, and would like to have some input from other people before then.