After skimming the mentioned sites, as far as I can tell, it looks like PC-BSD currently does not run in Virtual Box under MacOSX, at least for a person with little BSD experience, and can only be run in live mode.
That's unfortunate. I hope this can be easily fixed in the near future by either the PC-BSD, FreeBSD or Virtual Box people.
Thank you and I will continue to follow from the BSD sidelines until the situation changes or I buy a new computer.