Yea I would be very interested to this question as well. But as far as I can tell it is only Wire transfers and they need an IBAN# but US banks don't even know what an IBAN is it seems because it is not necessary for US banks. I think you can work with them but you might incure some heafty fees...
I do real well with Mainstreet even though I can't send them all that much traffic I had several 5 figure whales, conversion is pretty decent as well. Just my two cents since nobody seems to have much of an opinion on them.
-Jason