Any chance of a random event type thing like on neopets? For example.. You can configure events so they have a 1/900 chance of happening. For example.. you could create an event that was like.. "You trip over a tree root and hit the ground with a thud, -5 hp!" Or "You notice a dagger stuck in the tree to the right of you, You pull it out after some struggling, You gained Rusty Dagger!"
Also jobs... Mabye the admin could specify a job.. lets say mining. You could click on the Gold miner job. It brought you to a page with a work symbol on it that you have to click once every ten seconds.. then after 100 clicks a specified action happens.. and random events could be hooked in there too.
Like?