I think he means something like IGSO, that allows hosts to enable/disable add-ons in-game. It is already possible to enable them in-game by exec'ing them, but in order to disable them in-game, they would have to be packaged, and then disable the package in-game to disable it, and manually delete the datablocks.
After a second thought, though, the Torque engine generally requires a game restart to get rid of any exec'd script, while Blockland only requires a server restart. The system that allows this could possibly be implemented to allow changes without restarting the server. Just a thought.
