Zoom in any application
You can zoom in, anywhere on your system, by holding Ctrl and scrolling up with a scroll mouse (or with a scrolling trackpad). To unzoom, you hold Ctrl and scroll down until it is back to normal. It is a pretty useful feature but it is not perfect. One of the problem that I hope will be solved in Leopard is that the text doesn't stay clear. The "resolution independence" feature in Leopard is most likely the solution. Basically, the problem with this is that the image is stretched and you don't get any additional pixel. It can still be useful though. Unfortunately, I cannot really show you the effect with a screenshot so I suggest try it out!