The great thing about working with great students is following their successes throughout their career.
I just learned that Haifeng Yu was promoted to Associate Professor with tenure at National University of Singapore (NUS). Haifeng was my first graduating PhD student and now the first to receive tenure. Overall, Haifeng has always been drawn to deep, challenging problems and his work is always insightful. He did his graduate work on consistency models for replicated and distributed systems. More recently, he has been working on network security, system availability, and most recently coding for wireless systems. His recent SIGCOMM 2010 paper on flexible coding schemes will be (in my biased opinion) of great interest. In fact, it won the best paper award at the conference.