I finally got a domain name for my forum (
growspice.com). It seems to have integrated flawlessly. I didn't think it was working, at first, since I was just typing 'growspice.com' (but if I typed 'www.growspice.com' it worked just fine). It's helpful to know that www is pretty much a sub-domain. Anyway, I made growspice.com redirect to www.growspice.com and that solved the problem.
Anyway, thank you very much for the domain name integration functionality! It's extremely nice.
Not that I really need it, per se, but do you have ideas on how to make every URL link in my domain that doesn't have the www redirect to the same URL that has the www? Right now, they all redirect to the top-level www.growspice.com.