Well crap, I guess I was just about wrong on all counts. Guess I've forgotten more than I thought sence college. Now that you say about the "B", "Bb", "H" stuff, I remember all of that. But I never realized there was a difference between Cadd9 and C9, I just assumed that C9 was short for Cadd9.

As for parallel fifths, it is true that hard rock is built on parallel fifths, but I still try to avoid them when writing vocal haronies. I think the key is recognizing the effect that "breaking the rules has" and doing it when you want to achive something specific. As it turns out, parallel fifthing is something that defines the rock sound (at least for guitars).