Come on. You knew I would try it out after I found those other animated covers! Now, I know it's very simple, just the twinkling stars, but I had to create 42 different images to get that effect! (Actually, I created a whole lot more images than that, but I decided the other stuff didn't look as nice.) And I think simpler is probably better - don't want it to be too distracting :-)
Anyway, what do you think?