Animated charts in Excel
Watch Hans Rosling's TED Talks on debunking third world myths and new insights on poverty and ask yourself: could I do this with my own data? Yes. Google has a gadget called MotionChart that lets you do this. Now, you could put this up on your web page, but that's not quite useful when presenting to a client. (It is shocking, but there are many practical problems getting an Internet connection at a client site. The room doesn't have a connection. The cable isn't long enough. You can't access the LAN. Their proxy requires authentication. The connection is too slow. Whatever.) ...