Recently bought a new iMac (27 inch, 3.1 GHz) and only realised after the fact it had no USB 3.0 ports (just USB 2.0 and thunderbolt)... I'm transferring footage from my SD cards via the card slot on the Mac and wondered if getting a USB 2.0 card reader would speed data transfer up... compared to the built in slot? Any news on whether there will be thunderbolt card readers anytime soon? Can't believe Apple decided to leave out USB 3.0 ports on their 2011 machines!!