Converting Kinect Methods from Beta 2, to Version 1
Since I have this same question on Stack Overflow now, the answer can be found here. The updated version is:

private Point getDisplayPosition(DepthImageFrame depthFrame, Joint joint)
{ 
    float depthX, depthY;        
    DepthImagePoint depthPoint = kineticSensor.MapSkeletonPointToDepth(joint.Position, depthImageFormat);

    depthX = depthPoint.X;
    depthY = depthPoint.Y;

    depthX = Math.Max(0, Math.Min(depthX * 320, 320));
    depthY = Math.Max(0, Math.Min(depthY * 240, 240));

    int colorX, colorY;
    ColorImagePoint colorPoint = depthFrame.MapToColorImagePoint(depthPoint.X, depthPoint.Y, sensor.ColorStream.Format);
    colorX = colorPoint.X;
    colorY = colorPoint.Y;

    return new Point((int)(skeleton.Width * colorX / 640.0), (int)(skeleton.Height * colorY / 480));
}