DETROIT—Game Six of the NBA Eastern Conference finals between the Miami Heat and the Detroit Pistons was postponed Saturday so that the Heat could play their first preseason game against the Seattle Supersonics. "It would've been great to have determined who would've been in the finals, but this exhibition game was already on the schedule," said Heat coach Stan Van Gundy. "Sonics fans have been looking forward to this game all off-season." Representatives for both teams expressed hopes that the 2005 NBA Finals would be over by the start of the 2006 All-Star Game.