I have a 580EXII and have just ordered a 430 EXII. I also have a Phottix II transmitter and one receiver.
AM I right in thinking that I can set both speed lights OC on stands, put the transmitter on my 5D MkIII hotshot, place the receiver on the 580 and put the 480 in slave mode, hence being able to fire both flashes without the need for a second receiver. OF course, I do understand that I will need line of sight between the 2 speed lights.
I hope that you follow that!
Thanks for any advice/confirmation of my assumption