It seems only fair to give WLW a shot as well. It's actually very, very good, certainly the best blog client I've ever tried (even though I wish it'd allow you to enter arbitrary HTML tags -- but hey, plugins!).
As usual, Microsoft gets there late, but will probably manage to steal the show.
BTW, just to test a few plugins... last night we watched this "little" movie:
(uhm, what a huge box. And why the hell does it include various people in the link? Whatever.)
Update: when you update a post, sometimes a Blogger blog is not automatically republished. Bit of a PITA.