The site is powered by Expression, a CMS he wrote when he was younger because he was bored. (Not related to "ExpressionEngine" or "Expression CMS" - it's just a really popular name.)
It is hosted on a VPS by the excellent - and well recommended - xenSmart of PCSmart Group.
The content of the site is more or less random. If I find it interesting, the idea is that it'll eventually end up here. In practice, not so much.