speeding up disk-based laptop by moving /usr to flash?

[mark-OGhnF3Lt4opAfugRpC6u6w at public.gmane.org (Mark J. Dulcey)]

Richard Pieri wrote:
> The PCMCIA bus runs at about 1/3 the theoretical maximum speed of the internal disk bay (assuming UDMA Mode 4) so while you'll save on latency you will lose big on throughput.

Not quite true; a CardBus card could, in theory, JUST keep up with a 
UDMA 6 (133 MBps) device, as the bus is 32 bits wide and runs at 33 MHz. 
It's exactly the same speed as a PCI slot. Non-CardBus PCMCIA is too 
slow to even think about.