I figured it out too. I posted my excerpt around 1AM Eastern Saving time (11 hours ago), and I can get to the nano site now.
Now I have a big incentive to write more, to find some better passage to put in my excerpt. Maybe I'll change the excerpt once or more per week, even include the date the excerpt was written so people will know it's "recent." Does anyone else do that?
Does anyone read others' excerpts???