Looks nice, but you have the left channel backwards. If you would follow my link, you would know this.
Pins 1 & 2 : Ground (attach these together, some ipods don't like separate grounds), in fact you may also want to attack Pin 11 as well to these.
Pin 3 : Right Signal
Pin 4 : Left Signal
Just swap the connections on the left RCA socket to opposite of that you have in the diagram, then either attach both Left and Right RCA grounds together and run a single wire to Pins 1 and 2 (jumpered) or run separate wires from each RCA, but do make sure to attach Pins 1 and 2 on the iPod connector.
Side note - you'll want larger caps than 0.33uF to couple with a 10K impedance portable amp, 4.7uF is the "standard" for making sure there is no distortion, but don't expect ALO to follow that.