You can also configure a virtual hosting setup using AOLserver 4 and the nsvhr module, but again that means running separate AOLserver instances for each virtual host, as opposed to running all virtual hosts within one AOLserver instance.
Fairly accurate documentation is here:
http://borkware.com/rants/aolserver-vhosting/
One big advantage to the multiple server method is that you can hit your individual servers directly. This is a big help when troubleshooting.
