two people already mentioned this, but its worth saying again.
i really like the idea of attaching the frag itself to styrofoam (IF the frag is small enough, large frags will sink the foam).
when i moved from NC to MN, i had to bag all my corals 1 day before we actually moved (we drove the whole distance, 26 hours in the car). all my stony corals (montipora, hammer coral, candy cane...) were tied to a chunk of styrofoam then bagged in a breathable bag. all the bags were put into the same box seperated by cardboard (i had my pair of clownfish, all my corals, few smaller peices of live rock, sea urchin, snails all in the same box). after i got to MN, took me another 10 hours to have my tank set up and ready for the animals.
in all, i guess i had my corals in a bag for over 48 hours and ALL my corals survived except for my xenia... my fish were fine too. the only thing i lost was my sea urchin and the xenia.
i feel that the success of my tank move is mostly on the breather bags, but the styrofoam kept the corals suspended the whole way.
i know this isnt really "shipping" but its darn close enough that i can join in.