I second the recommendation to make the text darker. Looking at the actual page, you're currently using 67% gray (
#555555) for the text color, which is pretty light. I'd suggest going for something more like the 80% gray (
#333333) you're using on other pages. The only real reason to use small print or light gray text for legal boilerplate is if it's sharing the page with other content and you want to de-emphasize it. That's not the case here (and the text isn't really boilerplate anyway), so there's no reason not to treat it differently from the body text on other pages.
Other than that, I see nothing really wrong with the page as it is. The only thing I see that might be taken as "too casual" is some of the phrasing of the text itself, such as "You will be interested to know that..." (gee, will I?) or the closing "Your Friends at the Lab". Not that I think there's anything necessarily wrong with trying to make legal text more friendly, but the rather abrupt variation in the formality level does clash a bit in some places.
Oh, and use a real
sup tag for superscripts, don't fake it with
spans and CSS. Or, if you do fake it, at least make sure it actually works. (It doesn't for me on Firefox 20; the "superscripts" barely rise above the middle of the text.)