Has anyone tried to record any kind of fact-action video (like fast sports, for example) with the camcorder function on the iPhone? Is it blurry or does it come out ok - particularly in HD? I would be very interested if a good, HD video can be made of, say, gymnastics or tennis, where the people are moving fast. Also, if this can be done and look good, is there a way to station the iPhone to where you can set it to record and leave it for an hour or more? It's not like it can screw onto a tripod like a true camcorder can. And even a 16 GB iPhone should get hours of recording time in video I'm told.