Maybe I'm nuts, but I feel like this must exist, or should: a portable hard drive with integrated CF and SD card reader that does not require it to be interfaced with a computer. I'm envisioning something I could bring into the field or on trips such that I can insert my CF and SD cards into the reader, press a button, and have all files dumped to the integrated hard drive for storage, which I would then load to my computer when home.
This device would also ideally be battery powered so I could use it when away from civilization, but I could make do if I could plug it directly into a wall outlet or a portable USB battery like a NewTrent instead.
It doesn't really have to have a small screen for viewing files, though I could see the utility of that for deleting obviously bad shots (OOF, motion blur, etc) and thus saving the onboard memory space.
Does this exist? Am I dreaming? If so, let's build one, because I could see a lot of people buying it! I'd be happy though if I could just buy one now.