There is currently no information available on this APT package.
1. Standalone JBoss Appliance | TurnKey Linux Forum
Concerning your first point, Liraz, the jbossas4 package is fair to describe as useless, and should be properly marked as broken or incomplete.
http://www.turnkeylinux.org/forum/general/20100825/standalone-jboss-appliance
2. JBoss - Ubuntu Wiki
There is also a source package within multiverse named jbossas4. https://launchpad.net/ubuntu/+source/jbossas4/ However, this includes a bug - https://bugs.launchpad.net/ubuntu/+source ...
https://wiki.kubuntu.org/JBoss
3. [ubuntu] what packeges to download to fully install jboss and use ...
Ive been trying to install this jbossas4 package as well with no luck, I now know why! From the readme file of the package /usr/share/doc/jbossas4/README.Debian
http://ubuntuforums.org/showthread.php?t=1103080