Pit and cut peach and apricots into 1/4-inch dice. Divide fruit evenly among 16 sections of an ice cube tray. Add 1 teaspoon peach nectar to each section (just enough to cover fruit). Freeze, about 6 hours.
Put 4 fruit cubes into each of 4 chilled wine glasses. Pour 1/4 cup chilled Sauternes into each glass. Let stand 5 minutes.