For a basic introduction to Maven, see the Apache Maven site (http://maven.apache.org/).
If you want to use the JBoss application server or other JBoss projects in your own projects, see Maven Getting Started - Users
If you are a developer of one or more JBoss projects, see Maven Getting Started - Developers
If you would like to know more about how the JBoss Maven repository is configured, see Maven Repository
For other questions related to Maven, you can take a look at the MavenFAQ or post questions to the JBoss build forum (http://community.jboss.org/en/build?view=discussions)