I'm planning on stealing your idea there, Michael, except with a 3.5in HD (I wasn't thinking about the shock resistance, I hope it doesn't go kablooey).
How did changing to a 1mb filesystem affect your performance, though? I could still change my partitioning or filesystems, and I'd like to know how it went.
Oh, and is the voltage regulator not built into the battery or the inverter? That my scuttle my idea, as I have no equipment or knowledge for building electronics from scratch.
Oh, yeah--and is the disk access + slowdown while accessing fast enough to play video from?