Some people are reporting that their domains have stopped working. This may be because you do not have the correct DNS entry in your domain control panel. You may have set it up some time ago. You have an A record that points to 184.108.40.206 which is an address that no longer works. Remove that record and add a CNAME record of type 'www' that points to ghs.google.com. This address is an alias that will always point to the correct IP.
See the reference for Google's current instructions.