We've been able to listen to the earth for a while now, but this is more exotic:

Studying sound waves inside the Sun has provided new insights into the solar dynamo within, an international team of researchers reports in the journal Science today. They have detected variations in the speed at which different regions of the Sun's interior rotate, observations which appear to be intimately connected with the 11-year cycle of the Sun's magnetic activity and could explain more about how the Sun's colossal magnetic field behaves. ( mirror article )

Monitor the sun via these links