Gina Trapani with Adam Pash have wrote Google wave guide in 8 Chapters
Chapter 1 Meet Google Wave : Find out what Google Wave is and what problems it solves.
Chapter 2 Get Started with Wave : Set up your Wave account and create your first wave.
Chapter 3 Manage Your Wave Contacts : Find and add people and groups to collaborate with in Wave.
Chapter 4 Find and Organize Waves : Tag, file, search, and filter waves.
Chapter 5 Dive Deeper into Wave : Add rich content to your waves like maps and photo slide shows.
Chapter 6 Master Wave’s Interface : Navigate Wave from the keyboard and customize your Wave interface.
Chapter 7 Wave Gadgets : Add interactive content to your waves with gadgets.
Chapter 8 Wave Bots : Automatically update the contents of your waves with bots.