Hi -- I'm not sure if your familiar with Blosxom:
but one thing which is really cool about it is that your blog entries are done in a text editor and parsed into markup. For example, the first line is the entry's title and the rest the entry's body. I really like the theory behind this; not to mention the fact that it uses the file system as the database. The downside, it's in Perl, which scares me. Could these features be implemnented in PHP?
Just thought that might be something to think about as development progresses.