PowerPoint is not the real issue (although I think Prezi is a better tool). If the message is delivered to an appropriate audience in an appropriate manner, then Powerpoint is a useful tool. There are lots of presenters who need some proper presentation training and need to listen to critique to hone their skills. It is like any activity and needs practice if you want to engage an audience fully. Think about the message you are trying to convey and pick out the key threads. Do not overload the audience and definately don't read from the PowerPoint slides (especially from the screen - as your back will be to the audience). Know your subject and deliver the message with confidence. Don't blame PowerPoint - It didn't cause the car crash if the presentation went badly!