So a big tournament I started a while back on the Lord of Destruction board, which was ever-so-slowly filling up, seems to have disappeared. I think this was the link for it, http://www.wargear.net/tournaments/view/493, though now it takes me to an error page so I'm not positive.

I'm not sure why this happened -- is there a time limit on how long a tournament can be open? If so, I would suggest it not just disappear, but rather be filed as "canceled". That way you can still find it, and see that it is no longer viable.

Yes, there's a limit - 90 days. Fair point it should go to cancelled status.