This excerpt taken from the RIG DEF 14A filed Apr 2, 2008.
YOUR VOTE IS IMPORTANT
You may designate proxies to vote your shares via the Internet, by telephone, or by mailing the enclosed proxy. Your Internet or telephone designation authorizes the named proxies to vote your shares in the same manner as if you marked, signed and returned your proxy card. Please review the instructions in the proxy statement and on your proxy card regarding each of these options.