To further the Axeman, perhaps to add to the sex appeal of the Guru tags is to add the responsibility of reviewing the 'unanswered' tags.  

The fact is that most 'unanswered' posts have been answered but not accepted.   It probably wouldnt be good just to award the ones that have actually been answered with at least one upvote by 'accepting' the upvote/time priority winner when it might not be the 'best.'

Maybe there should be a view, available for those that have been awarded the gold guru tags (1000x upvotes for a tag), that list the 'unanswered' questions.  For those elite, they have extra votes: the ability to select the answer for the asker (after an elapsed time), the ability to close (as indecipherable, etc).