Finally owners of Apple's new Mini DisplayPort equipped Macs will be able to connect them to a TV or other HDMI device. Monoprice.com has posted a page for a Mini DisplayPort to HDMI adapter priced at $14.25 shipping on March 15th.
Monoprice is also offering two other adapters, a MiniDisplay Port to DVI and also VGA, these provide an alternative to Apple's offering at a significantly decreased price.
Apple already sells Mini DisplayPort to VGA ($29) or DVI adapters ($29) but does not offer an adapter for HDMI devices.