Re: @David Barrett
"People quote this sort of tripe without knowing the facts - it's bigotry."
Actually it isn't bigotry as I think you'll find that not knowing the facts is more often referred to as ignorance. As for tripe, it's fantastic in many preperations but my favorites are fried and braised.
But seriously AC, I went to the online Apple store figuring if anyone would have one it would be Apple. So I started here but there isn't a mini display port to HDMI listed so I checked the first one and there was no mention in the description that it worked with thunderbolt. One might think if it was compatible that Apple would actually tout that fact by adding a few letters to the description of the product, then again they said it would take weeks to update another page so maybe it's possible Apple is just bad at html.
Not finding anything specifically mentioning thunderbolt under "adapters" I tried "cables" and limited it to "Apple" products since I really didn't want to be bothered digging through Belkin's line of RCA audio cables and such. What I found was a straight thunderbolt cable for $49, a thunderbolt to ethernet adapter for $29 and a thunderbolt to firewire adapter also $29.
What I did not see was anything called a thunderbolt to HDMI adapter and frankly I found that odd since the first mini display port adapter I checked, which was to VGA, made absolutely no mention of thunderbolt compatibility and it also isn't mentioned on the this Air page and to top it off the MacBook Pro includes two thunderbolt ports and one HDMI port instead of three thunderbolt ports and an included adapter in the box.
It isn't like I didn't try to find out but they could make it easier to discover and yes that means putting a little note on every mini display port adapter1 and thunderbolt2 page as it isn't hard and I'd be happy, for a small fee, to write them a quick bash script to take care of it. Oh and before you go thinking I didn't dig deep enough just remember that neither will most people especially if they are just looking for a gift. Granted, as always, if I want to find out about Apple products I should have gone to Google firstlast tweak, I promise.
1 - thunderbolt compatible
2 - mini display port compatible