i like this idea; it's one of the main reasons i check out places like HN and Reddit on a regular basis: to see what other people are talking about. it's good that you've already got a "pause" button, but maybe "faster" and "slower" buttons would be good too; as is, it moves a little too fast for me to keep up with.
It repeats... So, I guess it's not really a "stream". I know this because I sat and looked at it for a bit, so it must have some appeal... And I'll admit I am a people watching voyeur.