Sorry, was channelling Joel and the Bots there for a moment (MST3K reference).
So in case you thought I was doing nothing... huh... you did? Damn.
Anyhoo... I'm writing an interesting supplement for my Legends of Sorcery book that will explore the magical powers of gems. As with the original, it trends more toward the mid- to low-magic end of the spectrum but will provide a lot of color to magic item creation and spell casting regardless of the kind of campaign you run.
More when I know it...