Ask HN: New research topics in networking ?

Hi, I am starting on my MS thesis this year. I am looking around for some good areas in networking to do my thesis in. I worked in VANETs ( Vehicular Ad-Hoc Networks ) for my BS degree. I didn't find the field that fun though. Can someone suggest some good topics in networking to work in, you know just throw in some ideas, whatever you feel like ! Like Delay Tolerant Networks are really researched on now as well as Ad-Hoc Networks, is there some other really interesting research going on in networking ?