Windows Live Writer
I have known about Windows Live Writer for a while now, and I had played with an early (pre-beta) version, but I have not blogged about it (or used the Beta version) until today.
Writer is cool. Setup took almost to time. Configuration included entering the URL to my blog and typing in my user name and password. After that, it worked flawlessly (so far). It even picked up the formatting and styles that I have configured. Pretty nifty.