Paul Stamatiou has the most digged Windows Live Writer blog post and it truly is a good post with lots of screenies. A few bugs have been found such as the one where a temporary posting appears as Live writer discovers what blog engine it needs to post to. I had this too when I set up menori.wordpress.com as a sand pit for testing Live Writer.
ZDNet have also commented on Live Writer being Microsoft’s first ‘killer app’ in their Live Services strategy. I couldn’t help but comment myself.