Kanex recently started the pre-sale phase of the iAdapt HDMI V2, a Mini DisplayPort to HDMI adapter with audio for the latest MacBooks and MacBooks Pro, as well as 21.5 and 27 inch iMacs.

With a single cable, users will be able to output uncompressed audio and high definition (HD 1080p) video to special HDTVs, projectors and monitors.
The product hit the market in mid-July, for $ 35.
(tip from Vr1)