I'm broadly interested in social computing (the social uses of the internet), and probably most of what you want to know is over on the comp.social lab site. I spend a lot of time writing papers; many thanks to Yahoo!, Google, Facebook, Samsung, the NSF & DARPA for letting me do that. Over the years, my students and I have also been fortunate to win a number of best paper awards and honorable mentions from ACM'S SIGCHI. My lab also enjoys building experimental web systems, such as Link Different and piggyback prototypes.
Recently, I became a DERP fellow and won Georgia Tech's Young Faculty Award. I'm also a Teach For America alum (Chicago, 2002–2004). Tech's press office is fantastic, and sometimes folks in the press write about my work. I primarily hang out these days over on Twitter and IRC. You can send me email at my work address.