I've finally upgraded my blog. You can find it at http://simonhewittjones.typepad.com/
As soon as the posts from this old version of the blog have been merged into the new one, the new one will replace this old one at my main address, http://www.simonhewittjones.com/blog/ . That could take a week or two.
In the meantime, all new blog posts will be at the new one: http://simonhewittjones.typepad.com/