Last week in L.A. I met up with Hoa Nguyen (VP of R&D, OKInternational) at Solar Power International. The full post and video are available here.
Here is a picture of the PS-900 solar soldering system that he mentions in the video. I use one myself, and haven't found any other system that transfers heat to cells as quickly. This solder iron is fitting for a "Solder Ninja"!