vehicles, like gliders, wagons, boat's (personal), and others
also maybe personal bulding materials (like castle walls, floors, stairs, furniture, and so on) that would be unable to clip with anything but other building materials, so that it can't be use to block stuff, and if it is there will be admins to rescue you... the castle stuff would be useful because there could be player made outposts near hunting areas and such, and when a post is made (atleast 3 walls, 1 door, and a roof used) a merchant, banker, smither, or such will be an option to pay to come... and when more of the neccessaries are used in the same area more bots can be bought...
that and a place where 2-10 bots build brick by brick a castle that will be used later as the capital of the country (it would help ad backbone to a political storyline, and serve as a perfect place for a supremecourt for Banzai, also a perfect place for the best armors weapons building materials, and misc) it would be kinda cool some bots dressed in worker outfits working kind of slowly to build brick by brick a castle... i could just sit there and watch.
well i'm full of ideas most bizare bust the rest fit in the sane category.