Dell Home Systems Dimension 3000: Dell has a snazzy new Flash-based system to “look” at their machines. You can zoom in on the front and back of the case, the internals, and do a 360 rotation. When you zoom in, click and drag the image to look around.
It actually came in handy because I was trying to find the cheapest Dimension with an AGP slot (the 4700, it turns out). Instead of finding and wading through the specs, I just zoomed in on the motherboards until I found one. Good for seeing what ports are on the front of the tower too.