Whatever you go with, you're ultimately going to have to have a fat pipe upstream (how many churches will have this???

) to deliver good quality audio/video upload.
What are you talking here, Jerome? High speed cable?
I would imagine the upload speed could be tested at one
of those "speed test" sites.
And then you'd need to get access to the church's internet so
that involves running a bunch of cable and taping it down.
And will the church go along with this? I guess that's something
the client would have to inquire about. And wouldn't it
basically require someone's full attention dedicated to just
monitoring the whole setup.
Yeah, "fat pipe" is slang for FAST ASS CONNECTION. Yeah, you could get by with moderate, but to get a decent looking and sounding stream to multiple viewers, it would probably be the size of a postage stamp... well, figuratively speaking.
Yes, church would most definitely have to allow it and cabling... probably unless they have a decent wireless router as that could work, but need the "fat pipe" on the modem.
Yes, you would need someone dedicated just to monitoring this the whole time. I'd like to do a 3 cam live switch streamed over the net some day... just to say I did it.
I don't really see this being too viable for weddings, but for my corporate client focus groups, we are going to make this a nice reality soon since a lot of corporations are cutting back on travel expenses... this way, they could all gather in a board room and watch on a LCD Screen or on their computers at their desk as its happening vs. flying, hotel stay, etc.........