MacBook Pros have ExpressCard 34 slot. The bandwidth is there, but there doesn't seem to be any high speed SSD devices made for ExpressCard 34. High speed SSD cards are around 100MB read / write, or anything faster than harddrives, for example Mtron makes a number of high speed SSD drives (but no 34 card). I think many professionals (photographers in particular) would be interested in getting a high speed SSD drive for on-location backup and scratch disk. Note slower ExpressCard 34 SSD cards already exist for a few hundred dollars, but these are the slower version that are only USB speed. They are same slow usb speed as thumbdrives, but more expensive than thumbdrives of same capacity. List your ideal SSD card config (or other usage ideas). KEEP in mind the market price is 32gb high speed SSD in 2.5" goes for slightly over $1000, thus ExpressCard would be either at a lower capacity or a higher price, due to much smaller volume available than 2.5" drives.