In order to keep better communicate with some old friends whom I just tracked down, I just opened an account at Live Journal. This means I now exist on three blogger databases (Live Journal, blogger.com, and Typekey), all in the name of diplomatic relations (and avoiding comment SPAM).
None of these environments talk to each other, even though the owners of Typekey just bought Live Journal. A real tower of Blogging Babel.
Of course, our blogs actually are self hosted here at the Wonderworks, so that makes four accounts.