That's great news.
As expected, it sounds like the HDMI functionality on the EVO is just fine, minus a few software enhancements we'd all like to see.
When I get my EVO, I want to do some research into what types of formats it can play through HDMI with whatever software is available. Also of interest: audio output. Given a 5.1 audio source, will the EVO output all channels through the HDMI? My guess is "yes," but who knows.
As far as viewing everything on the screen in HDMI, I'm guessing our XDA friends will set something up for us soon enough.
This is great functionality out of the box, though!