Manila Envelope is a native Mac OS X app, written in AppleScript Studio, that allows posting to a Manila-compatible site via SOAP. The app allows you to quickly and easily post either news items or stories to your web log without using a browser. Source code available at the product page.
What's new in this version:
This version completes support for translation of special characters, fixes a lingering bug that could require the user to force quit the application, and clarifies Manila Envelope's capabilities to post to Radio Userland (it can't, but it will). Full details in the release announcement.