Here is a CNet News article that I found pretty interesting about NSA surveillance. It appears Google is best in trying to protect it's users data.
http://news.cnet.com/8301-13578_3-57590389-38/web-mail-providers-leave-door-open-for-nsa-surveillance/ -- You received this message because you are subscribed to the Google Groups "Gmail-Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to gmail-users+unsubscr...@googlegroups.com. To post to this group, send email to gmail-users@googlegroups.com. Visit this group at http://groups.google.com/group/gmail-users. For more options, visit https://groups.google.com/groups/opt_out.