1. Combine first 3 ingredients in a small saucepan over medium-high heat, and bring to a boil. Stir until sugar dissolves; continue to boil 6 minutes or until liquid is reduced to 1/3 cup.
2. Place quartered berries in a medium bowl. Add warm balsamic mixture, and toss gently. Cool to room temperature. Cover and chill at least 1 hour, stirring well before serving.
3. Place a piece of pound cake in the bottom of each of 4 bowls or glasses; top with about 1/2 cup berry mixture and 1/2 cup ice cream. Serve immediately.