Now I wonder, could a slaved CF drive work as a huge music buffer for the player and/or storage for the FID database? In other words, use the CF drive as RAM instead of a memory upgrade. Sure, we know the player chokes trying to fill a huge buffer, but maybe there's more to be gained here.

It's not wired up that way -- not possible, nor desireable.

Instead, we could just have Hijack ignore the mlockall() call from the player, and then the same effect would be achieved by a standard Linux feature.

Cheers