Jon B. Ackeret, 55, of Las Vegas died Saturday, June 20, 2003, in Las Vegas. He was born Sept. 7, 1947, in Wauwatosa, Wis. A resident for more than 30 years, he was a table games supervisor for MGM MIRAGE. He is survived by one son, Jon A. Ackeret of Las Vegas; and one brother, Kevin Ackeret of Wisconsin.  Rest in peace, Jon.