I came across this idea when I was searching for a free faq generator -script.

Shortly:
* people could ask new questions, when normally they would add new links
* webmaster could answer questions by filling an empty field and validating + building links

I thinks Links would be ideal for this, because there's a category support ready to go and one could censor questions easily by not validating them.

It would take a little bit database and configuration re-construction. I'm going to be working on this next week. If you have more suggestions or questions, please email me!