I have done a presentation using PowerPoint 2007 today. OfficeArt in PowerPoint 2007 sure creates cool impact, especially if you combine it with animations. The feedback was great! Here's a screenshot of the presentation, showing you the Before (how the presentation originally looks like) and After (enhanced with PowerPoint 2007):
Figure 1: Before – How the presentation diagram originally looks like.
Figure 2: After – Presentation diagram enhanced with PowerPoint 2007.