I've setup a FreeBSD server (stable) running Postgresql 7.02, AOLServer and OpenACS 3.2.4 yesterday. Took me the whole day : morning to setup FreeBSD and "stable" it, afternoon for OpenACS and co (using the ports, as Guido said).
I'm a totally newbie to OpenACS, I've taken notes and hope to be able to put them on the web quite soon.
The _only_ thing I can see against FreeBSD is its Java non-support (I've understood Java is needed for the OpenACS WebMail)...
