Couldn't someone make rollerblades that strap on like snow shoes? Seems like it would be the ultimate compact design. If you're already riding the tiniest folding bike in the world, I doubt the dork factor of blades would be significant.
You've just described those roller skates that they make for little kids that stap on to the shoe. I don't know if you've ever tried them, but they're mostly useful for making your kid think that roller skating is a horrenously impossible feat.
Have you used rollerblades or snowshoes? Showshoes have a very flexible binding system, and rollerblades need to be quite stiff in order to have a hope of functioning properly, and not snaping your ankle in several pieces. In order to make such a thing, you'd have to wear some sort of plastic boot, and then have some solid binding like a pin tech binding to attach the boot to the rollers.
