Unfortunately, Muse's official site is one. You can - on advice - go directly to the appropriate flash or basic html sites, but this jams the page up in the left hand corner and, I'll be honest, it doesn't look as nice as when centred.

So I wrote a page that puts the flash in the middle. It uses one table, seems to work in both IE and Firefox and doesn't resize your browser to do it. You can find it here.