Submission + - Gmail to use SMS verification on signup.
Sinn3d writes: "Users signing up for a Gmail account are now being asked to provide a mobile-phone number in the continuing war against spam, though Google will keep it handy just in case anything else turns up."
http://www.theregister.co.uk/2009/07/29/gmail_mobile/
http://www.theregister.co.uk/2009/07/29/gmail_mobile/