Developer at the Concord Consortium, board member at Common Media, Inc., former graduate student at Tufts, former geek-of-all-trades at Sinauer Associates, sometime track writer.
Server Fault
Q&A for professional system and network administrators
Sports
Q&A for participants in team and individual sport activities
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Ask Different
Q&A for power users of Apple hardware and software
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Drupal Answers
Q&A for Drupal developers and administrators
Home Improvement
Q&A for contractors and serious DIYers
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
The Workplace
Q&A for members of the workforce navigating the professional setting
Personal Finance & Money
Q&A for people who want to be financially literate
LEGO® Answers
Q&A for LEGO® and building block enthusiasts
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs