I have just downloaded and installed <a href=”http://www.flock.com”>Flock</a>, a new browser based on Mozilla. It has a built-in editor that allows you to post to your blog. It’s easy enough to configure.
If you can read this, it worked.
[Update: as you can see it doesn’t appear to handle HTML correctly. I typed in the HTML for the link by hand but it appears to have escaped some of the characters. Still, it is only a beta version. Interesting idea anyway. I imagine it would be more useful for managing more than one blog.]