Self-hosted, but currently down due to Rails problems with the server. So I'm now considering converting to wordpress -on- a self-hosted server. I'm not worried about my server going down, there's been more software troubles and I'm counting about 6 including this one, although technically this is a server problem.

I'm thinking of slicehost with wordpress. It's an extremely stable blog, but it's too taxing to keep it up to date on my own rather than using someone elses free service.