This is a test post from MarsEdit; when I originally tried to add the Vox blog, it couldn't determine anything about it, but now it tells me "Blogger-compatible." Vox*. I did ask the Vox people which, if any, API they support but I did it just now and at the end of feedback telling them how lame it is that they don't support Safari so I expect it will be a while before I hear anything back. :-)
One of the *very* nice things about MarsEdit is that it supports Markdown previewing; alas, I don't think it will edit the post when it submits it.
Note that Daniel Jalkut has taken over MarsEdit and has been doing battle with Vox to get support.
This was posted using a pre-release of MarsEdit; you can go to here for more info.
*When I first created the draft, it did say Blogger-compatible but now Daniel has updated it to be Vox, which is Atom-based. I didn't notice the change when I first posted this, hence this comment.

Ah, that's a cool idea; I currently just use the built in editor and it would be nice if it... read more
on MarsEdit vs. Vox