I've got mixed opinions of StackOverflow.<p>On the one hand, it's definitely better than ExpertsExchange, and does an adequate job of providing answers to many developer questions.<p>On the other hand, it's far (far!) from living up to it's potential. The basic premise of the site is that the wisdom of the crowd will separate the gold from the dross; however, the incentives lead to a plethora of mediocre answers which do <i>not</i> converge (Wikipedia-style) towards some platonic ideal, despite Joel's stated wishes to that effect. What's more, there's a well-documented problem ("the fastest gun in the West") whereby the first semi-correct answer will quickly rise to the top, drowning out later (but more correct, more thorough) answers.<p>In short: they haven't (yet) solved the basic problem of "changing the way people get answers".<p>What's more, gaining the critical mass of early users was leveraged largely through Joel and Jeff's celebrity. Which is not transferrable to other domains. Which means that the site can't easily scale out.<p>Based on the preceding, I'd say that VC money is a good way to go-- it should give them the resources to a) solve the basic problem, and b) build subscriber bases in other domains.