Hello and Welcome,
I am a labrat in the Impulse Lab and work in Computer Architecture with Prof. Rajeev Balasubramonian. I also happen to have the unique honour of being the lab watchdog. On a more serious note, major areas of present interest include 3D architectures, power-aware architectures and more recently, on-chip interconnects.
The fundamental law of computer architecture - Good, fast, cheap: pick any two.