Nice, simple, clean 404 page. They have a beautifully designed fly-out menu (although I don't get the grayed out nav items that look like they're inaccessible). They put their search up top and then list out the most useful links. The subtle 404 lettering in the background is a nice effect too. Most of the time sites throw that number in your face when a lot of users have no clue what it means. (When did we decide it was okay to throw error codes at people anyway?)
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