Japanese blog post about it at <a href="http://alpha.mixi.co.jp/blog/?p=1333" rel="nofollow">http://alpha.mixi.co.jp/blog/?p=1333</a> .<p>Too long to translate fully, here's Mikio's 4 main design principles:<p>1. Simple and logical UI. (He likes w3m). Content and style completely separate.<p>2. Accessibility (follows from point 1). Text-only browsers, mobile browsers will do fine.<p>3. Convenient image insert using special markup<p>4. He loves Wikipedia and adopts some of its conventions