Nuketown's been upgraded to Drupal 6, which is the latest stable version of the open source content management system. So far, things seem to have made it through the upgrade intact, though I discovered that the Image Assist module now only wants to display images that have been "published".
I think that my test instance (aka The Testing Range) may also have accidentally spammed those with user accounts by sending them an email with links to a bunch of published comments. If so, I apologizes for that -- I'm not exactly sure what why those messages had queued up.
It's possible that there's still some stuff that needs to be cleaned-up post-upgrade, so if you see anything that looks weird (or is outright broken) please post a comment to this thread or email me at email@example.com.