<p>The Stack Exchange system has a <a href="http://data.stackexchange.com/" rel="nofollow">data site</a> (more information <a href="http://data.stackexchange.com/help" rel="nofollow">here</a>).  There you can get data on any of the network sites.  You will need to extend your account to the data site, and know SQL, but then this should be possible.  </p>
