I have been using a great little free app called Mac Journal to write my posts and then cut and paste them into the Blogger posting window. On occasion I’ll use the Blog This! button, but there were limitations to both posting methods. Kung-Log was designed for Movable Type users, but works for Blogger as well (not all the features, though). It takes about 30 seconds to set up and you can post right from your desktop! I just read about it yesterday in an article on blogging tools in MacWorld magazine.

Mac OSX only.