This is an example of using Powerpoint to create a game of Jeopardy with your students. It creates an element of interaction that otherwise wouldn't be possible with the computer.
Everyone wants to make Jeopardy games or Wheel of Fortune in their IWB software. Well, here's an easy cloud tool that works great when used with a smart board. Of course, use it as a pre-test, a formative assessment, or for just plain fun. But again, with a save-able URL, I feel better organized having my tools on the Web.