Excuse the KB answer, but here it is:
We don't currently have an SDK available, but, over time, we will provide open APIs for various parts of our picture experience. As you can imagine, we're focused right now on shipping the Lytro cameras to U.S. consumers. Supporting developers is very important to us, but we're just not able to do it all right out of the gate.
Please let me know if you have any other questions on the matter, I'll do my best to answer them.