with these adapters, you could use usb3 or thunderbolt.
http://addonics.com/products/adu3esa.php - pc only for now
http://www.youtube.com/watch?v=nuq0WhA9IBw - @30sec
or adapters from sonnettech
i'm waiting on a good thunderbolt to pcie slot chassis for putting a REDRocket card and a Atto R680 of H680 inside it.