Struggling to find a Mini DisplayPort to HDMI adaptor that supports audio for your Mac? No worries. The Kanex iAdapt should have you covered.
The iAdapt HDMI V2 has been engineered to support full 1080p HD video output and audio to a single HDMI cable. Kanex iAdapt HDMI V2 will allow you to connect a Mini DisplayPort equipped Apple computer to any HDMI enabled external display such as an HD projector, monitor, or HDTV.
The adaptor will run you $30 and can be preordered now. [Kanex]