Genius! I never would have thought of this. I may well have to incorporate it in to the demo :o)

Enter

javascript:document.querySelectorAll(".skew1")[0].contentEditable=true;document.querySelectorAll(".skew1")[0].onkeyup = function(){ document.querySelectorAll(".skew2")[0].innerHTML = this.innerHTML };

And you can edit the big one in the top left (and its shadow!).

Really amazing what HTML5 is capable of doing (and what people is capable of do with it of course)