I setup windows live writer today. I really like posting using this over the web interface. Not sure how to tag my posts yet… Oh, found it. At the bottom of the writer interface there is a categories list you can select your tags. You can also set the publish date there.

Live Writer: http://gallery.live.com/default.aspx?pl=8
Code Plug-in: http://gallery.live.com/liveItemDetail.aspx?li=1f57bd9b-a692-4593-9e9e-e2962d9c0eee&bt=9&pl=8