I've just downloaded and installed the Windows Live Writer beta from Microsoft.

I've gotta say - it's a nice piece of work. It analysed my blog, figured out I've got a blogger account and downloaded all my style sheets, etc so that I edit posts in the actual format they'll be shown on the blog.

This is so much better than doing it via the blogger tool, which is just a web based rich text editor, that gives some basic formatting, but not a genuine live preview of the post you're writing.

I'll have to spend some more time playing, but this is so cool - I think I'm sold :-)