Very cool. How hard would it be to go in the opposite direction? When I'm using a desktop or a laptop computer it's most annoying that almost all news sites, blogs, eg. optimize for a portrait orientation. I can only see a relatively small amount of text so I have to scroll constantly, despite the acres of available whitespace to either side. It's really annoying when reading anything complex where you'd want to refer back to previous sentences or paragraphs frequently to make sure you've understood the substance properly. I would love to be able to reflow into 3 or 4 columns though...