Go to Newsweek.com, press ↑, ↑, ↓, ↓, ←, →, ←, →, B, A, hit Enter<p>Credit goes to Reddit: http://www.reddit.com/r/reddit.com/comments/cf02e/go_to_newsweekcom_press_b_a_hit_enter/
Here are more sites that feature the Konami code:
<a href="http://konamicodesites.com/" rel="nofollow">http://konamicodesites.com/</a>
(note: you have to perform the Konami code to enter that site!)