Here’s a fully responsive tag cloud (with edit mode access) made with the new responsive layout engine and a little custom CSS.
It broke with some recent updates to the new layout engine, but I just tweaked it to work again by modifying four CSS properties. It works on mobile Safari and all major desktop browsers. I don’t currently have access to an Android device but have no reason to think that it won’t work there.
Anyway, it’s potentially useful in a lot of scenarios. It would be really nice to just tick a checkbox to enable it.