Related: Jquery parallax plugin
This seems like one of those “why didn’t anyone think of this before?” kind of ideas. I haven’t tried it yet but the video makes it look promising. I’ll edit this post if it ends up not panning out. Thanks to Juan for the tipoff.
For some reason I just realized that Hoefler Text (from the incomparable Hoefler & Frere-Jones) is a standard font in OSX. I got really excited about the notion of using it in the place of Georgia in HTML, but strangely Firefox isn’t displaying it correctly.