For a specific amount of orbs, lets say 500, you should be able to change the biome of your town with /g biome. This change would have to be approved by staff, however, would just make it so that you could have a different color of grass/leaves within your town. This would be very useful for some towns that could change what the look like with such a simple feature. The change should have approval of staff (to prevent some town in the Ice Taiga from becoming a Jungle), however, could be useful for some towns.