There is a link on the WebBeans Overview Page:
http://www.seamframework.org/WebBeans
...Read this guide to getting started...
/this guide/ points to this (non-existant) page:
http://docs.jboss.org/webbeans/reference/1.0.0.ALPHA2/en/html/ri.html
If someone wouldn't mind updating that link... I'm sure a few of us would appreciate it.
Updated. Thanks for the tip.