Oh hey with the new DS Browser will there be a special kumoricon DS browser format for viewing with the DS?
It shouldn't be necessary. I believe Opera on devices uses the full desktop rendering engine, including all JavaScript, at a simulated 1024*768 screen, and then scales down the page to fit on the screen. You can zoom in or out. At least this is true on both the Wii Opera browser and the Opera browser for Windows Mobile. For example, the Kumoricon front page renders almost perfectly on both of these devices in Opera (when set to Desktop mode), and it uses some advanced CSS and Javascript. (The four boxes aren't sized quite right though. They use Javascript to attempt to be as small as possible and display 4 across, or in a 2x2 shape, depending on your browser window size.)
Also, on the Windows Mobile version of Opera, there are two alternate layout modes which do various things to attempt to render the page in one column so horizontal scrolling isn't required.
Sorry, Apple, but it's just not true that the iPhone is the first mobile device to have full Internet.