UPDATE: Disqus has been re-installed. Everything seems to be working as it should. Almost all (with the exception of maybe 50) of the older WP comments imported correctly.
Funny how posts that I delete (in this case because the animation wasn’t working and I didn’t see a way to edit images) just come back to life as “Guest.” That’s also happened to me on other sites with Disqus. If a moderator is looking, feel free to delete the two extras.