Blocks now display, but still don't show who is in the chatrooms (which is mysterious since the exact same phpFreeChat calls are used to get the list of chat users in the Drupal 6 module, and it works perfectly).
Custom (per-node) chatbox titles and channel names are now correctly saved in the phpFreeChat database, the node object, and the parameter array that is passed to phpFreeChat, but sadly are not used when the chatbox is displayed (though it works perfectly in the Drupal 6 module). The global settings are displayed, regardless of per-node settings.