Snow Leopard is finally here! I just received my copy, and after creating a full Time Machine backup of my system, I went ahead with the install process. My main computer is a 17" Unibody MacBook Pro, 2.66GHz with 4GB RAM and a 7200RPM 320GB hard drive that is running OS X 10.5.8. Since I use this machine for most of my work I was a little nervous about how the revamped underpinnings of Snow Leopard would interact with the various programs I rely on; therefore, the first thing I did was ensure my backup was functional and accessible so I could restore to Leopard if necessary. I then opened Disk Utility and ran a drive verification on the boot volume, to be sure the drive was functioning properly before continuing.