You know how quests have a arrow that points to quest giver? what if there was that same arrow for when a expensive curio is about to spawn?
A mother of pearl or ice for example.
You could change settings to which arrows you'd like to see, to see different nodes that will spawn soon in your supergrid. These arrows could be toggled on or off, so it won't annoy people that aren't interested, but for people who want these resources, and desire to contest it, it would certainly make this game more interesting.
I could see people spending literally all day everyday just chasing arrows and fighting for nodes.
Vote here http://www.strawpoll.me/11358867/r