If you can use scanning to find subdomains and new domains registred by google it’s not easy to find this one :

GPPGPLE.COM

The domain is registered by google, inc on 2000-May-26 and expire on 2006-May-26. Maybe you know it, but it’s the first time I know it exist, I catch it from referer to my website and I noticed that the links are http://images.gppgle.com/ and not http://images.google.com/. A Typo and you won’t be lost.