Wired's How-To Wiki has a step by step guide for upgrading your Mac to, OS X 10.6, otherwise known as Snow Leopard. In the article Wired promises to "walk you through the things you should do before you make the leap to Snow Leopard, and how to go about the actual installation, including how to install it even if you aren't using its predecessor, OS X 10.5 Leopard." Don't expect major new features however, Snow Leopard is said to be "more about incremental upgrades, refinements and speed boosts."
