Lets hope it gets fixed because Open Live Writer is the key component that makes Blogger usable. Don't just leave it to the Open LiveWriter team to fix Google, DO SOMETHING POSITIVE FOR A CHANGE...FIX IT or help the Open Live Writer Team understand why you are doing this.
Having to use the web interface for blogger to post this is, just bring out arcane the blogger tools are.
PS :: OK I fixed it myself, I had to "reconnect" the blog and google asked if I could authorize the blogger api for Open Live Writer. I did and the error disappeared. So Google had forgotten me!