In the daytime I design and build web services and web apps for one of Japan's biggest Internet service companies.
But here are some things I do which aren't my day job:
Q&A for professional and enthusiast programmers
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language
Q&A for SharePoint enthusiasts
Q&A for professional system and network administrators
Q&A for apps, scripts, and development with the Stack Exchange API
Stack Exchange Network staging zone, where users come together to build new Q&A sites