I use Bryar, Blosxom also has its fans, Movable Type is used by a lot of people, but I'm sure you could find more via google.

/J\

Serendipity looks really cool. Why reinvent the wheel if you have something that does what you want? PHP is designed for web database interaction, which is exactly what you need in a blog. If I were to write blogging software, I'd do it in PHP.

Anyway that doesn't exactly answer your question. I've installed MoveableType for some customers. They seem to like it. There support team is great. There is also slashcode.

I'd also suggest checking out drupal which seems like one of the best CMS out there (but of course it is written in PHP so you won't like it).

Basically, I don't think it matters a whole lot what language it is written in, as long as it works and has a good way for you to get support.