Tony Ruscoe is an expert at uncovering secret Google services, or more specifically, anything to do with hidden Google signup pages. Just a couple days ago Tony found a login page for Blogger -- Google's blog service -- that was only available for a limited time. The link that once pointed to this page has now reverted to the usual "The page you requested is invalid".
Why is that interesting? Well, blogger accounts are completely separate from Google accounts and definitely not compatible. According to this new information, you can expect to have the option to log in with a Google Account soon. I don't know the source of this screenshot, but I'm positive it's the real deal.
It's always a challenge to merge completely separate user accounts into one, but Google has that covered too. For those who currently use blogger, there will be a way to migrate your current account by following this link. Unfortunately, the page is dead and will probably not be available until these changes are rolled out.
[screenshots from Tony Ruscoe]