I am lead developer for the Safe Screening product, at Safe Computing.
Being super interested in the design of web sites and generally applications I hang around the HTML, CSS and jQuery type tags on StackOverflow.
I started off on the web like most using pure PHP, today I use the Django framework written in Python and grab any django questions when they pop up.
Programmers
Q&A for professional programmers interested in conceptual questions about software development
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
Server Fault
Q&A for professional system and network administrators
Ask Different
Q&A for power users of Apple hardware and software
Photography
Q&A for professional, enthusiast and amateur photographers
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
User Experience
Q&A for user experience researchers and experts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts