Yeah so I've done some research on this and why there isn't any 1Ah setups.
The dynohub puts out a variable amount of power that is roughly 500mA. It can go up to about 600mA when you're really cruising but it's really not a huge difference. There's just not enough juice to power the iphone and the light at the same time. Infact, without a cache battery there's sometimes too many fluctuations to power an android phone. My iDevices don't seem to be as sensitive but that could be because of the specialized circuitry they added to enable iDevice charging. (Not sure what they did there.)
As for how I have them wired.. Just wire the light and The Plug in together. Don't wire them using the light's out because that has significantly less power and is meant for being used for the brakes. I can draw up the wiring if anyone's confused about it...