It was a long time coming, but thankfully its here (and I apologize if its been out but I'm just not hearing about it.) You got MSN adCenter Desktop BETA, AdWords Editor... now Yahoo Search Marketing has YSM Desktop! Has anyone tried it? I just downloaded but can't use because I'm not signed up with YSM yet.
I've used it. It's based on Adobe Air, which means it's a browser app on steroids. My favorite desktop editors in order from most to least liked are: Google, MSN, Yahoo. Yahoo's is a little slow, and it doesn't really "feel" like a desktop app.