Personally I haven't found Stack Overflow useful for anything in a looong time. At work, usually my problems are specific to whatever proejct I'm working on and my peers are the only real source of answers regarding that. At home, if I want to work on some cool new thing then a Wikipedia page or good write-up on someone's blog is the goto source for useful, structured information.

The few times I have seen SO recently have been from friends trying to do Linux things, looking for answers on SO, and finding some ludicrous answer that is either just wrong or an extremely roundabout (and overcomplicated) approach to solving it.