I was just using google maps and thinking about how the rendering engine, contemplating how much work it would be to plot a map like that using dhtml elements 1 pixel at a time.
And then I thought about how it might not be too difficult to write an app that pulls in a jpeg and outputs the dhtml for you.
Note to self: sleep on this.
Found two resources:
An app that reads in a jpeg and outputs html: jpg2html
And a nifty way (not covered in the link above) to output said jpeg data using html 4.0 (dhtml, or with more jargon, ajax). JavaScript Graphics Development.
Still not really seeing the commercial usage… dhtml rendering is too slow. It’ll come to me, though. :-)