I'll be updating the underlying content management system of this website in the next week or so. I'll be moving it to Drupal 6.1. I know there will be a few features missing such as Similar Entries.
You'll also come back to a new look - ok, I'm cheating there, I'll be using on of the default themes while I'm waiting for contributed themes to catch up. That suits me, I wanted to change from this theme since it was looking a bit too busy.
I'll leave a maintenance message up, hopefully for only an hour or so.
Edit - I was going to upgrade today, but there's one feature I still want to have confirmed for Drupal 6.1, it's the ability to integrate with Feedburner. Currently I'm using the Feedburner module, but I've been looking at using the Path Redirect module instead. I'll probably hold off upgrade until I can happily integrate with Feedburner.