This plugin has been closed as of September 12, 2018 and is not available for download. Reason: Unused.
You may have an idea of how long and hard I searched for a plugin that did this. This one does it, and despite being old, unreviewed and unknown - it was the only one I could find, and it does it really really well. This plugin let me save my post to two (or more) Wordpress sites. YAY! Everyone has been looking for it. It's been here all along.