I read about these in EE Times a while back. PCIe is massively faster than SATA, so this is a radically better way to use Flash. Apparently, Adobe thinks so too! Of course, I'm out of PCIe slots, so I'm out of luck until my next box.
http://www.storagereview.com/fusionio_accelerates_adobe_cs6_postproduction_software_with_new_iofx
http://www.storagereview.com/fusionio_accelerates_adobe_cs6_postproduction_software_with_new_iofx