Stackoverflow.com is a fantastic online resource for answers to technical questions. There are several reasons that Stackoverflow.com is better than other sites. Jeff Atwood, who is the founder of stack overflow described the site succinctly as "expertsexchange.com without the evil. :)" The Webster's type definition would be:
Stack Overflow is a programming Q & A site collaboratively built and maintained by your fellow programmers. It is unique in that it uses aspects of wikis, blogs, digg, and forums to allow the best answers float to the top rather than stay buried somewhere among other less useful answers.
I loved experts exchange. It was the site that helped me get started in programming back when I was learning Perl. I was amazed at how quickly people would give of their time to answer my questions. Now I am glad to see an even better resource called stack overflow. Give it a try. You'll find higher quality answers than any other online Q&A site.