Teaser?

It's not a stripped version of PowerPoint with a timer on it. It's a viewer. If someone made a PowerPoint 2007 viewer released under GPL, you would probably urge this professor to use that. But, if distributed by Microsoft, it's poison that's not to be trusted.

Office 2007 Home and Student contains PowerPoint and costs $127 retail. A far cry from $500.

Luckily I was able to type this post fast enough. Windows might blue-screen and suck the money from my wallet at any moment.