Switched to blog format

I've finally switched over to a standard blog engine for this site, so most new material will be in the form of blog posts.

Old material will remain as is. The most important old pages are listed here on my homepage.

The reason for the change in technology is convenience - it's just quicker and easier to post in the blog format. That's partly for technical reasons, but also because blogging is an excuse to give up my attempts to impose hierarchical structure on the site ;-)