Microsoft Windows Live Writer 2008 is a free blogging tool that makes posting to your blog much easier. It has just left beta and has become a full release.
It works well with Microsoft Live Spaces and WordPress, and there seem to be a great deal of plugins that allow you to (for example) add Flickr images.
Setting up with your blog is very easy. You just point at your URL with username and password, and it figures out the rest.