In reply to phillwv.

Hi,

I have developed such an Desktop-Editor for Wordpress. Different is that my Desktop client does not use XML-RPC but instead uses his own Webservice which will be installed as plugin in wordpress. So you cannot only manage posts, as also comments, pages and medias. I have published it a few months ago, but did not get much downloads, but also did not make advertising efforts for it. Previously it was developed for Joomla, but then i integrated also Wordpress.
You can download it from http://www.desktop-content-manager.de