Hey Jacob, how are you liking Leopard? I finally got it installed on my Macbook this afternoon and so far it's been a mixed bag for me. The dock is taking some getting used to as I have to really look to see which programs are running. The stacks seem okay, but it's going to take some getting used to. I HATE the new folder designs. Looks like something we'd have seen back on OS 7. : ) the Time Machine is my favorite new feature as now I don't have to back up everything manually on my external drive. I'd rate the overall experience a success, although I was expecting a bit more given the long development cycle.
I saw that someone talked about clean install or upgrade. I wasn't given the choice on mine. Unless I was going at it too fast and missed it. So far I haven't had any kernel panics or other problems that severely plagued my Macbook back when I first bought it.