Assume the following interface and implementation:

public interface TheInterface{
    /**
     * This method does nothing
     * @param arg1 the argument
     */
    public void myMethod(String arg1, Long arg2);
}

public class TheImpl implements TheInterface{
    /**
     * @see TheInterface#myMethod(java.lang.String)
     */
    public void myMethod(final String arg1){        
    }
}

Up to netbeans 6.9 it was possible to navigate to the interface method by ctrl-clicking on the "myMethod" in the @see tag in the javadoc of the implementation.

Since netbeans 7.0 this only leaves a "Cannot perform Go to Declaration here" message in the status bar.