I'm surprised no one has posted this yet. Basically, newly manufactured premium 360s (not cores) have HDMI. You can tell if it has HDMI by looking at the box, which will have the HDMI logo if it has HDMI.
Not sure if it has 65nm chips yet, but I wouldn't be too surprised if they did. Someone needs to open up the systems first to find out.
Makes the Elite see a little bit pointless now except for an extra 100gb..
And yes, Microsoft has confirmed they do have HDMI now.