Sorry, I didn't find the ram drives to be so cheap when I searched the internet. you must have found a better source for them than I did.

.11 msec access time ( or latency ) ?

the intel x25-e claims to have 75uSec latency.
x25-e

and I don't have to copy the data over to the drive at startup and it's probably fast enough you don't need a raid anyway.
I know I'm biased because I'm using the x25-e and only put WoW on it and symlinked it to it's old location.
I've noticed a pretty good improvement on load times as I'm sure anyone using these ram drives would.

to each his own I guess.