The examples covered throughout the book can be downloaded here. You can deploy the examples by first editing the included build.properties file to include the following settings:
jboss.home - the location of your local JBoss instance (the examples have been tested against JBoss AS 4.2.3.GA)
seam.home - the location of the latest Seam distribution (the examples have been tested against JBoss Seam 2.1.1.GA)
Once you have made these changes simply execute ant main deploy.
You will need to read the following section of the Seam 2.1 ref doc: 39.4.2. Changes needed for deployment to GlassFish
With some tweaking, Seam apps will work in other JEE app servers but it's easiest to use JBoss AS (esp. if you need BPM integration), esp. if you're just learning...