One thing I would like to add; 12 close votes per day is *not* enough; I would prefer you to increase the limits to 30.

I make a habit of only closing questions that have 4 close votes, and there was not a singlee day when 12 close votes was enough; there are just too many lousy questions, inappropriate questions, duplicated questions, belongs-on-superuser/serverfault questions that require merciless closing.

In addition, to create incentive to close questions, you should really, really award [badges for users who already close a certain number of questions][1]. Better yet, this set of badges should be able to be awarded numerous times. 


  [1]: http://meta.stackoverflow.com/questions/25053/badge-for-closing-question