I could actually refine this question, because I've wondered about the same thing.
I remember Michael sometime in the past mentioning a gadget that's without a preview screen - it just eats CF-cards, downloads the contents and stores them. I have come to the conclusion that, while those Epsons are drool-icious, I can't afford them, even if they could show Nikon D200 NEF:s (which, I'd remember, they don't). So, just a portable device that would empty CF:s to a HD, nothing more, is what I'd need.
I'm going away to Thailand for two weeks in January, and I'm worried that my 5GB of memory cards isn't enough.
Addendum: Upon closer review, this Nextodi thing would come close, however it seems to have many fancy features that probably just make the gizmo cost a bunch in excess. Is there a dumbed-down version of this somewhere?