So before I add a whole list of questions, does anyone know if there is a FAQ for MultiCore?
Not as such. There should be, I know. I just haven't had time to compile one. One more thread that really needs to be tended. However most frequently asked questions have been answered in detail more than once, so do avail yourself of the forum search facility. Also, if there are any civic-minded folks out there with a handful of good multicore links that really cleared things up for them, I'd be happy to add them to the FAQ section of the website if you point them out.
Finally, what's the best place to ask questions specifically regarding MultiCore set-up and implementation in the future?
In the MultiCore board of the particular framework you use. If that's AS3, then that would be: http://forums.puremvc.org/index.php?board=27.0