The short of it:
- Capacities up to 2TB (Sabrent Rocket 2242)
- Speeds up to 500MB/s (roughly SATA3)
- Hotswappable
- Bootable without BIOS mods
- ExpressCard 34: T400s, T410/s, T420/s, T430/s, T510, T520, T530, W510, W520, W530, W540, W700/ds, W701/ds, P50, P51, P70, P71
- ExpressCard 54: R51e, R52, R60, R61, R400, R500, T43/p, T60/p, T61/p, T400, T500, Z60m, Z61m, W500, X200/s/t, X20/s/t, X220/t, X230/t