Amir Salihefendic is a passionate web developer. He co-founded Plurk, a popular social network that has millions of users. He was Lead developer of Plurk, and has contributed to the opensource project of Plurk. Recently, he founded Wedoist and Todoist, which are web applications focusing on productivity, participated Start-Up Chile in 2011.
Update: James Tauber will give a keynote in PyCon Taiwan