Kanex (http://www.kanexlive.com) has released the US$34.95 iAdapt HDMI V2, a a Mini DisplayPort to HDMI adapter with audio, for new and revised Mini DisplayPort connectors on MacBook and MacBook Pro mid 2010 models as well as all 21.5-inch and 27-inch iMacs.
MacBooks and MacBook Pros released in mid 2010 as well as 21.5-inch and 27-inch iMac models are now equipped with a new and improved Mini DisplayPort that can support both audio and video output. The iAdapt HDMI V2 is a single cable solution designed to pass both audio and video through the Mini DisplayPort connector. You can connect the iAdapt HDMI V2 and view high definition playback in 1080p and uncompressed digital audio with HDTVs, projectors, or monitors.
The iAdapt HDMI V2 supports video passthrough for all Mac models with a Mini DisplayPort connector. Its design allows for a single cable solution for HDMI connectivity.