OFF CAMERA flash, tricky but possible!
This just proves to me that it's impossible to please everyone. You complain that Sony doesn't use the standard ISO hotshoe. Guess what, when Sony comes out with the standard shoe people complain about not being able to use their existing flashes and need to buy an adapter. If you want the standard shoe, buy the NEX6 or wait for the 7n. If you stick with the 3/5 series then just accept that you can't have EVF and flash at the same time.