It seems SSD caching is really taking off with OCZ and synapse http://www.ocztechnology.com/ocz-synapse-cache-sata-iii-2-5-ssd.html and other companies joining them -- http://www.corsair.com/ssd/accelerator-series-ssd-cache-drives.html What it basically does is act as an SSD cache in conjunction with any hd, be it a 2 TB hd, or a raid configuration. Pretty cool for those that don't want to micromanage, or reinstall their HD. The OCZ an corsair use proprietary software, but theres also software on the horizon that can be used with any ssd. http://www.romexsoftware.com/en-us/fancy-cache/ (windows only for now, beta testing). Could you use this being implemented in the macbook range anytime? This way you can get SSD type speeds and don't have to sacrifice HDD space.