I really hate to praise Microsoft but I have to say they have really made a few excellent products lately.  First, I really like Windows Live Writer its not perfect but its way more enjoyable to use than any web interface for posting to a blog.  I have investigated many weblog engines and played with the web forms they use for posting new content and I much prefer a desktop application for performing that task. I really wish there was a weblog editor for the Mac that was as good as Windows Live Writer.