pk4,
My understanding is that a few Aussies have come thru the Eaglejet program to Ameriflight. I guess it's easier for Ameriflight to use a system administered by a 3rd party than run the immigration/visa gauntlet themselves ? The lower time requirements of Part 135 appear to be advantage of the visa seekers.
I've not heard of any other TP freight feeders availing themselves of the E-3 program.