Is a Hybrid theme the only way for you to join the contest. If you haven’t used this yet, I suggest you to trying this theme. I’ve been using this in many project. It is my top favourite wordpress theme framework ever.

The deadline for submission is August 21, 2009 at 12.00 a.m. Central time.

The prizes

1. 10 lifetime exclusive memberships to the theme club and a $50 gift card to Amazon.com.
2. 5 lifetime exclusive memberships to the theme club.
3. 5 lifetime exclusive memberships to the theme club.

Each of the three winners will also be granted lifetime access.

The rules

1. This contest is open to anyone (you don’t have to be an exclusive club member to enter).
2. You must be using a child theme of the Hybrid theme framework on your site.
3. You must be using the latest version of the Hybrid theme (version 0.6 at the time of writing).
4. The site must be your site.
5. You must make use of the Utility: 404 widget area to create your page.
6. You cannot alter the PHP or HTML of the 404.php template directly.

If you’re wondering what 404 page mean, it is an error page shown to visitors of your site that have gone to invalid URL. I have joined to his contest, here is one of my invalid url http://webedewe.com/404

Source:
http://themehybrid.com/archives/2009/07/who-can-create-the-coolest-funniest-smartest-404-page