I'm beginning to understand the sudden lack of messages on the blog. Beta is driving me crazy. It's fine for posting, managing the blog, all that stuff. But visit someone else's blog and try to leave a message and you have to sign in with your Google account. Fine if you've got one... Maybe. I was just at Barbara Hannay's blog and Google refused to recognise me and after three attempts I gave up. I was concerned that it wouldn't let me into my own blog, but here I am, no problem.
I suppose it will stop spam posting, which is great, but if it stops everyone else, that seems like one step forward, two back to me.