You just got your gliders in August - are you bored with them already?
No - your sugar glider should not have any contact with other pets of another species. Gliders are very scent oriented and territorial. They may fight with any other animal in their immediate area.
Your glider would love to have a rat or hamster - for LUNCH - literally. Gliders are fully capable of catching and killing another small animal for food.
We had another forum member try to house a glider with a hedgehog - that resulted in the death of the glider.
If you choose another pet - plan to keep the two species in separate locations - either on opposite sides of the room or in another room all together.