As described by Brian in the original posting:
A new year, a new Twitterverse. 2011 marks the debut of the Twitterverse 1.0. Again, I revisited the landscape of useful Twitter apps designed for marketing, business, and service professionals. This time, we organized and positioned “representative” apps across 19 rings in the Twitter egosystem over the previous 12. Like its sibling, The Twitterverse is designed as a transmedia object.