I have never been entirely happy with any blog editor I have tried so far. The best I found on Windows was BlogJet but even that wasn’t good enough for me to get to the end of the free trial of, I guess I always preferred writing the HTML up myself.
I guess what prompted me to go looking on Mac was an issue I am having with the WordPress WYSIWYG editor in Camino. It is really slow. So slow that the screen lags 2-3 seconds behind your typing. I will look into why at some point but I decided to go on a hunt for a decent blog editor because hey, it really should be all fluffy bunnies and WYSIWYG on a Mac, right? :)
I tried three (MarsEdit and Qumana were the other two) and the one that really stood out for me was Ecto. It has a really nice editor, it is logical and it has all the essentials like tagging through Technorati (see how quick that became an essential?) and flickr support.
I guess there isn’t much more to write about it, but that is a good thing! It works just like you would expect it to and isn’t missing any features. I have no idea if i will stick with it or move back to the plain old HTML editor on the web interface, but I like it for now.