I just recently discovered Windows Live Writer and i must admit i like very much the idea to use one tool to update all my blogs from one central place!
But the centralization is only one thing. There are lots of other things that make blogging easier. For example you have several plugins to insert just about anything in the blog, from pictures to videos and from maps to code snippets. And if that is not enough you can extend Live Writer with plugins available from the vendor or from third parties.
Formatting text and arranging content is also easy, when setting up your blog in Live Writer the software just imports your template and you have the blog template behind (like a background) when you write the blog post. It just feels like frontend editing!
I just have a feeling that this will boost my blogging productivity in the next period.