iDemo is a tool that simplifies real-time demonstrations of iPhone apps and games. iDemo connects to your iPhone over WiFi and mirrors your iPhone screen on your desktop, in real-time – kinda like Steve Jobs during his keynote presentations.
The best way to find out if iDemo suits your needs is to download the latest version and start the trial mode. They encourage you to do so before purchasing a license. Also, make sure you go to the help section for instructions on how to use.