great idea...

I was reading through an article of what makes a successful design homepage & I came across the suggestion of customising your 'error 404' page so that people visiting your website don't just press back and go elsewhere like the majority of people do.

I found this website of '36 cool custom error 404 pages', what a great idea...

http://dzineblog.com/2008/11/custom-error-404-pages.html 

this one is my favourite...