Colin Walker brought up yesterday the idea of using your website as a private repository.
This also occurred to me a couple of months ago when I searched a better alternative for Day One. This blog which runs on WordPress looked great for a private journal, but I didn't find anything that would migrate my entries from Day One, so I created a script for myself. I've open sourced it on GitHub so anybody with a little bit a terminal knowledge should be able to use it.
Before you ask: I still use Day One with encryption turned on. When I reasearched the topic of private posts using WordPress I found a couple of security concerns which I've also shared on Colin's blog. But after last week's Day One security fiasco, maybe it's something that I should reconsider.