Both units are scheduled to start shipping at the end of March. The flash will cost a hey $629, while the transmitter will set you back $470. That's some serious scratch, but it's only about $80 more than Nikon's top-end SB-910 and it includes built-in radio triggering. We're eager to get our hands on them, especially if Canon will lend us 16 of them to try out that whole zone-triggering thing (hint, hint). We'll bring you our review as soon as we can spend some time with a retail unit.