title: Should I put forum threads into my sitemap?
body: <p>I have a website about to launch with a forum facility. Should I put each thread into my <code>sitemap.xml</code> file, or will Google just find the links to each thread via the forum itself? Don't worry: it doesn't require registration to read the forum.</p>
  
  <p>If yes, how best to keep it up to date? Doing it by hand is obviously not an option for that amount of data.</p>
  
  <p>One way I've considered is writing an Apache <code>mod_rewrite</code> which redirects requests to <code>sitemap.xml</code> to go to <code>sitemap.php</code> which would then generate the entire thing on the fly.</p>
  
  <p>The other way I can think of is to set up a cron job to generate the map and dump it to file once a day. Are these good options, what else could I do?</p>