Canon E-TTL radio transmitter?

Hello,

Is there any manufacturer who make Canon camera/flash radio transmitter (or transmitter-reciever combo) which have full E-TTL function when use Canon camera with several Canon flashes?

Thanks.

I have found this: www.radiopopper.com. Anyone knows anything about it?

The radiopopper is the only radio based device that is capable of TTL control at the moment.
You need an ST-E2 transmitter or an E-TTL transmitting flash such as the 550EX or the 580EX to use the radiopopper, which, unless you already have one, puts the price up considerably.

I've thought long and hard about it, and I've decided to go with PocketWizards and manual control instead.
I've used manual for a long time with ordinary slave cells, and I get on fine with that, so I can't really see any great reason to switch.

Thank you Ben.