I am typing this on WLW Beta 3. I wrote about the first beta, which was already very usable at the time. This is the best of breed in blogging software on Windows.
Quite a lot of changes for beta 3, but the best thing for me is “Publish XHTML-style markup”.
In other news, CCleaner 2.0 is now RC and Spybot Search & Destroy has reached 1.5.1 final. I recommend both very highly.