"Has anyone seen anything like an estimate of missing persons (lists of names of persons unaccounted for)?"
There are lists and they are vast - but don't forget there is no phone service yet - it'll take weeeks - but one list on the net had 50 names per page and it seemed like ten pages to get past the aarons
The only list I've seen is the missing persons database on nola.com (the Times Picayune web site). But it isn't organized (it consists of roughly 500 messages from people trying to find loved ones). One wonders how many of the poorest and most vulnerable residents in NO have relatives with internet access.