Thanks to my techno-brilliant daughter, here's how to fix at least one of the Google Blogger failures some of have been faced with for the past couple of days. Use this link to go to Skye's blog - the easy to follow instructions are right there. Instructions for Fixing Comment Snafu.
Hope this helps.
Unfortunately, I still can't seem to completely sign in or sign out of my blog - I'm in a kind of limbo-land. I have to enter my blog through a back door to do anything. But at least I can comment now.