Campbell Barton and Matt Ebb have put together a nice video demonstrating the new array modifier in Blender 2.42. You might have seen this after reading about Matt's post, but we thought some closer attention was needed!
From Matt's site:
Campbell â€˜Ideasman' Barton showed me a very cool .blend file he made to demonstrate Blender's Array Modifier, new in the upcoming Blender version 2.42. I thought I'd light, comp and render it to make a nice demo movie to use in the 2.42 release documentation. The white 3D axes are the controller objects.
What's even cooler than the video (if possible) is the .blend file that Matt posted with it. It's definitely worth a look since you can see how not only the animation was done but you can take a look at the compositing nodes to see how a Blender master does it.
If you don't feel like opening the .blend file and exploring the scene, I took the liberty, using the opensource and free CamStudio screen recorder for Windows, to breifly go over of how the basic animation was controlled: ArrayDemoExplained-XviD.avi (10.7 MB Xvid - remember to right click and Save As).