I was doing testing earlier this year to prove whether or not it is possible to sync two cameras using nothing but cheap wireless triggers (from YongNuo) with flash using Sony / Minolta high speed wireless sync. So far it looks promising, as you can see there is a slight exposure variation between the left and right cameras, but this might be possible to work out. Both cameras must “think” they are controlling the flash, but you have to cover up the on-board flash of one camera so prevent the flash from getting confused. I will do more experimenting with this if/when I get my second a700 body repaired (it hit the ground with a heavy lens, tearing it apart).
Eventually, I will post more on my interest in 3D photography, and why you haven’t seen much of it from me, except a couple tests so far.