I don't get the fascination with Diaspora. StatusNet is distributed, open, easy to set up, established, and extensible, and already has a large number of users (e.g. on identi.ca). What does this bring to the table? Newness?
The web has no attention span. You're either brand-new and hyped beyond realism, or ancient and boring.
At least near as I can tell without signing up.
I know a tiny number of geeks who are on identi.ca, and a small but larger number of people including both geeks and non-geeks on Diaspora. Maybe I'm atypical?