Blogger has recently made available a Microsoft Word add-in that allows one to edit, save as drafts, and publish posts from within the Word application. This short post is being created in just such a way.
NOTE: This application is supposed to allow you to open and edit the last 15 posts, but this does not seem to be the case. It may be a configuration issue with Word, or perhaps a firewall issue. I'll do some more exploring, but for now it seems that once posted, subsequent edits and corrections will need to be made from within Blogger.