Invent Baltics, an Estonian research company has made some advances in robot swarm technoloy. FTA:
The project partners used fixed RFID (radio frequency identification) tags to help the swarms with positioning and navigation. The tags are used by the robots for coordination and task sharing, and are marked with various surfaces and objects.
Thanks to the ROBOSWARM technology, simple robots will be able to communicate extensively so as to split individual tasks in order to heighten the functionality of the swarm (i.e. scalability), to learn from the experience of individual swarm members through the local or international knowledge base (i.e. self-learning), and to operate with as few sensing capabilities as possible (i.e. cost efficiency).
Let the overlord jokes begin...