You can now pre-order Mac OS X 10.5 Leopard on Amazon.com. A single user license costs $129 while a 5-license family pack is a bargain at $199.
According to Apple this update contains over 300 changes and enhancements, including the Time machine automated backup tool, Spaces virtual desktops and Spotlight searches across multiple machines. I have to admit that I'm kinda looking forward to taking Leopard for a spin once it's released - who knows, it might even push me over the edge and make me buy my own Mac ... maybe.
If you're planning to upgrade to Leopard, which new feature are you looking forward to the most and why?