Great 'Page not found' 404 design from Google

Working on multi-lingual webmaster duties for Kellogg's European Foodservice operation does oftern have me jumping from Google.fr to Google.es and Google.it. So I have gotten into the habit of making the same search across the territories by just changing the domain suffix. I'm not sure what I did but I stumbled on a page that is very rarely seen. Google, despite building an empire from captalising on the ease of users making multiple searches, also follow the best practice of having a friendly, well designed "Page not found" HTML replacement page. If you don't have this in place on your site I'd speak to your agency and ask for a design that reflects your brand's tone of voice.