faceCart has been tested on JBoss 4.0.5. A problem with JBoss 4.2.2 has been located. This version of the application server uses by default JSF RI 1.2. In order the application to start, it must be disabled.
A maintanance release should be expected in the next few hours or day at most. Installation guide will be updated too.
Thanks to extazo for location and solution of this issue.