Hate to steal EeePC's thunder, but this has been done in embedded PCs on mini-itx form factor computers since flash storage was available, pre-sata connectors.

Hate to steal EeePC's thunder, but this has been done in embedded PCs on mini-itx form factor computers since flash storage was available, pre-sata connectors. It looked like a 1-inch nub that fits in the IDE connector. It was perfect for embedded PCs since power requirements were always very low for flash memory and an easy way to save a watt.