I ran through the old long CF thread to try and find any useful info for now. Much like a few others in the long thread, I've found plenty of dual CF to IDE adaptors, but they all appear to present the two cards as a master and slave device. None, including the one I linked to earlier with the plastic shell appear to do RAID0 on their own. And I'm not quite adventurous enough to try what russell did to get 4 cards onto the one IDE bus.

Bitt linked to this, and it seems like a potential alternate solution, as this would allow 8 total MicroSD cards to be installed into an empeg easily. Problem is, I can't find a place to buy them from, nor any confirmation on if it actually works in IDE mode. I'll try and contact them to see if they can answer the IDE question before I spend more time trying to buy one. If it supports 32GB MicroSD cards, that could allow 128GB in one drive slot far cheeper then a 128GB CF card.