Quora certainly hopes so. But Sprouter could give them a run for their money.

On the one hand it's not like Quora has to dominate every market space to succeed -- StackOverflow will be better than them for programming questions, and there's a law site whose name I forget that rocks for legal stuff. But since this is so close to their core (Silicon Valley web startup scene) it's potentially a real challenge...

[Apologies for the duplicate comment]