Hello,
I haven't logged into the forums in over a year but I thought I might add to this thread.
Whereas you cannot get true video-out via the USB port on the EVO, you can use Dalvik Debug Monitor [DDMS] to essentially capture a series of screenshots in real-time to simulate video.
This method is slow, for obvious reasons, but it worked for me in the past when I presented a slide show.
Let me know if you want more information.