Apple Details Thunderbolt Display Connection Options - MacStories
Amazon.com: Mini DisplayPort to HDMI Adapter for iMac Mid 2011(27-inch, 21.5 inches) Mini DP to HDMI Adapter Compatible with MacBook Air/Pro, Microsoft Surface Pro/Dock, Projector and More 1-Pack : Electronics
Apple updates iMacs with Sandy Bridge processors, Thunderbolt ports, FaceTime HD camera and more - 9to5Mac