"Take all the web usage and YouTube video data Google has been acquiring about us all, glue it to our data down at the credit bureau, tie it to our mobile phone

"Take all the web usage and YouTube video data Google has been acquiring about us all, glue it to our data down at the credit bureau, tie it to our mobile phone number and our mobile activity"... Yahoo has as much, if not more data about us than Google - and for longer. Yahoo knows everyone I emailed for the past 10+ years (Yahoo! Mail), what links I find interesting (del.icio.us), what links I find interesting but don't want you to know about (Private del.icio.us), where I've been and who I meet (Flickr photos), who my trusted friends and family are (Flickr Contacts/Family), what online communities I take part in (Yahoo Groups) - and we haven't even touched on Yahoo Web Search History. Plus I've bought domains from them so they have my CC and home address. If Yahoo wanted, I am sure they could build a frighteningly accurate dossier on most of us. Why is it that all these Big Brother scenarios worry about Google finding out everything and more about us rather than Yahoo? Is Yahoo such a has-been or has Google taken on quite the Sauron persona - the all-seeing eye?