MarsEdit will make you a more prolific blogger.

Same as any other decent desktop/offline blogging client, of course (I use ecto, myself). Apparently the utility of a desktop client is something that is not yet widely accepted? I’m surprised. It’s got even fewer downsides than a desktop email client, and lord knows, I basically just don’t send email if all I have is webmail. Of course, I almost never do anything on the computer if I can’t use my own computer for it, so I’ve got issues anyhow.