AOLserver: ad3.3+ad13 is probably best. ad3.2+ad10 or ad3.2+ad12 suffers from a memory leak problem if you let it kill idle threads with Tcl 8x interpreters.
(Conversely, just configure it to never kill server threads, which is what AOL does for performance reasons anyway)
PostgreSQL: Latest official release is always the preferred release.
pgdriver: OpenACS.org
ns_xml: I'm not sure, Ben, Roberto?
Obviously we'll need to clearly document this stuff before release, and if aol3.3+ad13 is no longer easy to find at arsdigita.com, we should have a copy here for downloading.
