Currently, I am not running openACS/.LRN servers, so I have asked Martin Matuska to update the ports and to take over maintainership.
The updates ports have now been committed to the FreeBSD ports tree! They work with FreeBSD 6.2 and use openACS 5.3.0, .LRN 2.2.1 and aolserver 4.5.
He has done a marvellous job and maintains his versions at http://www.matuska.org/martin/cgi/viewvc.cgi/ports/ (The post-config script may not work !).
Ask Martin if you have any questions.
It was fun to create a one-line installation procedure for openACS/.LRN on FreeBSD, but I am glad I found new blood to step up to the plate. Cheers!