I don't know about event video like weddings. That's where I think DSLRs fall woefully short in ther video capabilities. At a maximum record time of 30 minutes, you will probably miss some of the ceremony...yikes!
I was under the impression that the record time is limited due to the sensor heating up. Does that mean there has to be a cooling down time between sessions? I don't think it's quite ready for prime time.
Scott Chapin Powder Springs, GA, USA Nikonians Team Member