Pusan University recently concluded their work on using Openflow Wifi Access points to do smart traffic control and hand-offs. Read the full paper here.
OpenMUL was used as the SDN Controller for their research work. Apart from providing a solid core platform, OpenMUL provided a flexible abstraction layer which helped them to write highly customized system apps in a jiffy.
It is really amazing that SDN/Openflow is being applied to so many areas. Keep up the good job @Pusan University team !!!