That link points to a 2.5 MB PDF that is licensed as Creative Commons Attribution Non-Commercial. I'm hoping to get a cleaner copy at some point soon--if I do, it will be posted at the same location. I got a MUCH better copy as of noon on 11/3/10 and it is now posted at the above link.
Byron Reeves and J. Leighton Read have written the best book to date on games and work. Business people still seem hung up on the virtualization of the office when in fact WoW increases group productivity not because it is virtual but because it is a game. Reeves and Read try to right the ship. They describe practical ways for using game design to make work better: Not just for the bosses, but for employees too. Imagine if the workplace were no longer boring. That's where we're headed, and these guys are great guides.