I don't personally have one, but I just got done video chatting with my brother on his. I was really impressed with the picture quality -- at first I didn't believe him that I was really talking to him (via video) on a cell phone. It's really amazing how much it changes the dynamic of a 'phone' call to be video chatting with someone...and from anywhere!
...well, anywhere in the 4G coverage area.
Edit: I called him from Skype on my laptop to his Skype account on his Evo4G which was running Fring.