One of the best "programmer-asks-questions-formus" I know is stackoverflow.com. It is just like the old experts-exchange, except it is free and it contains no commercials. It is also very simple to ask questions. Just log in with your openID and ask a question!
I have been a reader for some months now but today I finally asked my first question: http://stackoverflow.com/questions/802612/how-to-write-a-null-safe-compare-in-pure-sql.