I have a suggestion.. I would love to see the teleporter pass through a circuit signal to the far side. i.e. "Activate this inserter when the remote side has < 100 furnaces". That would let you use conditionals to decide when to send things through. This would be very useful when building large environments - just drop in a teleporter with some active provider chests pulling from it and hook it to the logistics network to get a signal. Only send items through that are needed - i.e. inserters < 100, passive provider chests < 200, miners < 200, etc. Right now I can do it with a whole stack of teleporters, one per item and limit the chest output, but it would be SO much nicer to do it with a single teleporter that can feed circuit logic back to the teleprovider chest.