Thanks for the compliments, all.
The benefit to using this vs. a simple replacement set is that it is MUCH easier to change things globally on the fly. I've been toying around with different custom sets ideas, and the best one I have come up with is this: If you site has official colors, you could create a few called { sitecolor1 }, { sitecolor2 }, etc. This gives you the abliity to use these colors over and over again.
Just a few ideas...