Well, a pilot error on my part is a definite possibility here, as I am fairly new to OpenACS. Would have been nice if I had figured out where I may have erred, as I *thought* I followed the install docs as far as OpenBSD would allow. Other newcomers may find the same hole I went in.
I had to adjust ulimit to get AOLserver to run at all, as it failed gracefully in a malloc(), but the core dump was a different issue altogether from what I could see.
Apart from the FreeBSD specific quirks, then I didn't and don't have any problems when installing on that platform.
Frank.