Secret teleportation Easter eggs might also be fun. Make a strange concoction and open a wormhole. Or give some people the power to see hidden openings and other people the power to walk through them.
I was thinking about a "help from my friend" teleportation. You can use the teleportation points of your friends in the game at the same moment, with the normal amount of energy for you, and a small amount of energy for your friend.
Your friend has no obligation to accept the teleportation.
+1 for teleporting to friends. I would say that in the event of teleporting to friends, the teleporter and teleportee would share the cost. Multiple friends in the same area could be invited to participate in this sharing.
+1, but 500 currants seems a bit low...somewhere in the thousands seems more appropriate to me. after all, you are asking to be able to instantaneously beam yourself to multiple pre-arranged spots.
I think when someone is working on a project they should be able to teleport back to it. So if you go off to get something it doesn't take you 20 minutes to get back there with it, by which time it's not needed any more. Also, maybe after you work on a project you could keep the teleport to it. But I think as you gain experience you should get to keep more teleports, it shouldn't be so time consuming to get to places you've already been through dozens of times. In other games you can always teleport to a place once you've walked to it. It's just taking way too much real-time holding down the arrow keys for no real purpose. I think you should be able to go to any street when you want to, if you've already been there before.