Page is a not externally linkable
-- Google SEO News and Discussion
---- Cache Links - webcache.googleusercontent.com not IP address. Is this new?
RonPK - 7:15 pm on Apr 8, 2010 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4103449.htm
I always assumed they used the IP address to avoid any confusion about the ownership of the content: Google wanted to make it clear that the content was not their's. They seem to have changed their minds.
Brought to you by WebmasterWorld: http://www.webmasterworld.com