An off-and-on hobbyist user of Aolserver from 3.x days. Never been an OpenACS fan, hope that doesn't get me into trouble someday. My Aolserver runs on Debian 3.1 using the aolserver4-* binary packages, so I thank the maintainers for their time and effort.
Current primary AOLserver interest:
"Web 2.0" buzzword tinkering with AOLserver: AJAX primarily. Atom/RSS, "Web Services".
Current seconday AOLserver interests:
Best Practices on cookie management and session management with AOLServer
Best Pratcices for identity management and authorization model AOLServer
Tinkering with a standardised phpinfo() alike command: 
Blogging/discussion software, especially usefully multi-user.
SVG graphics generation.
Application model and management.
nsdbeans data layer (similar to Java's EJB, or Python's SQLObject).
SOAP conversation with directi's reseller server 
Current 'real' work:
A lot of JACL/TCL scripting in the test automation world for "nameless big software company". WebSphere includes a JACL administrative shell that is quite useful for scripting all kinds of configuration and test activity for J2EE applications.