This most likely will make no sense at all, first shipping from China to the US and from the US to Europe.

I'm not sure about this ethernet controller vs. Raspberry PI, I've just posted some questions to the original Prisma thread, maybe you can have a look?

I don't own a Raspberry PI and know nothing about it, so it would be interesting to know what exactly is necessary to operate a full set of 10 devices with cgminer on Raspberry PI.