Never got an invitation to Gmail? Now you can sign up for your own account. Just visit Gmail now. They send a validation code via SMS to your mobile phone, so as to prevent automated signups.
More info from the Google Blog.
Update: If you live outside the U.S. you’ll have to find someone who already has Gmail and request an invitation from that person. I’ve disabled comments here due to a large influx of idiots. And don’t ask me for a Gmail invitation.