'Stack Overflow' rocks hard!

I can't believe that I only now discovered Stack Overflow. It's an excellent programming Q&A site which also happens to possess the best user interface and design I've ever seen on the web (if memory serves well). [update: this great design is shared by other sites in the family]

[sidenote] Within a few minutes of asking some question, I received a number of high-quality answers. It's amazing!