I've got an iPod touch and I too have noticed this problem, but it has been with a number of site not just this one. I think that if we intend to read the menu bar we are just going to have to deal with it. If they make too much smaller, you won't be able to read it.
One thing that I've noticed that helps if you read it horizontally.
P.S. Who knows, maybe Devmaster could sell it as a feature.:lol: