Also, handouts != slides. A good slideshow is sparse, so handouts from it won't have much data. Try to put enough in the slides to make them useful as handouts, and they'll be a mess as slides.
Steve Jobs' unveiling of the iPhone is on YouTube. Watch it! Learn from the master. And watch his slides, and imagine how awful they'd be as a handout, and enjoy how awesome they are as support for his verbal presentation.
I have to disagree on the Steve Jobs advice. People liked his presentations because they buy into the whole product image and they'd be on the edge of their seat to see what he was announcing.
If your audience actually wants get useful in-depth technical information (e.g., to evaluate an app development framework) or new skills, don't try to come off like Jobs.
Steve Jobs' unveiling of the iPhone is on YouTube. Watch it! Learn from the master. And watch his slides, and imagine how awful they'd be as a handout, and enjoy how awesome they are as support for his verbal presentation.