Not to derail the OPs topic but this is somewhat related:
I've been debating getting a new MBP even though Apple ticked me off not including Blu-ray. I can get a notebook BD drive and put it in a small enclosure so that it's still "somewhat portable," for when I travel. But my BIG concern at this point is that I've seen NOTHING regarding Apple's implementation of HDCP in the new notebooks. DP supports HDCP, but doesn't seem to require it (as HDMI does). The fact that they've released mini-DP to DVI and VGA adapters but NOT mini-DP to normal DP or HDMI adapters has me a bit concerned.
I want to pick up my notebook tomorrow, but I'd like to have this resolved if possible ahead of time, so as not to risk a 10% return fee. If anyone out there has a new MB or MBP and has already installed bootcamp and either XP or Vista, you would be doing me a huge favor downloading the
Cyberlink Advisor which does a quick system check for Blu-ray playback. It's a very small utility, and the link goes directly to the company's webpage, so no viruses, etc. Obviously, an MBP will fail the test as there's no actual Blu-ray drive, but I (and likely others) want to know if it passes the HDCP test -- meaning Apple included the necessary hardware (should be, as it's included in the Nvidia chipset) as well as HDCP-enabled drivers (not so sure). Thanks in advance to anyone kind enough to do the test.
BTW, as for the OP, DP supports audio and video and there are DP-to-HDMI adapters that support both audio and video. But it depends on the way Apple implemented displayport on the machines. Since there's no mini-DP to HDMI or mini-DP to DP adapter yet, there's really no way to know if Apple has audio supported through the port. But you can DEFINITELY use the mini-DP to DVI adapter, then use a DVI to HDMI cable or adapter into your TV, though you'd need to send the audio separately. A slightly more elegant solution is to get a DVI+optical audio to HDMI adapter (these are larger than the more simple video-only adapters) and the requisite cables. These will do everything you want, but they aren't as cheap or nearly as simple as a proper mini-DP to HDMI adapter would be.