Your options now are simple:
If you still have no idea what I'm talking about, you can read about the attribute. There are still a couple of bugs when the scoped blocks are deeply nested within other scoped areas so I'm hoping someone with a keen sense of how to straighten out Webkit oddness can help. When browsers don't implement functionality, it's a bit tricky to guess what they'd mean.
Aside from that, it's cross-browser (IE7+) compatible and ready to use. I'm interested to know if anyone finds it useful or finds any odd combinations of styles that don't scope nicely.