Just got a response from the folks at Yongnuo, and the long-suspected (and awaited) addition to their YN-560III manual flash line is going to be released in a few weeks. For those that don't know, the 560III flash includes a wireless receiver inside it, so that it can be triggered by the Yongnuo 603 radio trigger and this "future device" with the same radio signal.
What many have suspected is that the 560III units themselves have internals that allow for remote control of the power level (1/2 power, 1/4 power, etc.) along with this triggering. Cactus got to market with this first, with their RF60 flash and V6 transceivers (plus Cactus V6's can control many other brands power levels as well), but the YN-560III is a popular and low-cost manual flash, while the 603 trigger to trip it is rather basic.
So, look here at the YN-560TX, which really looks like the bottom half of a 560III with a different screen.
Apparently it also controls zoom (hey, there's a "zoom" button!) and can do stroboscopic effects (Hz), unless the 2.4Ghz is not set in stone.
Last edited by panoguy; 06-08-2014 at 11:52 AM.