There are a lot of weird conspiracy theories floating around the Internet regarding Nick Berg's murder. (See here and here, for example).

I can't answer all of them, but jeez, I don't think it's surprising there's so few records about Berg's company, Prometheus Methods Tower Service. It was very small and was headquartered at his foreman's 11-acre farm. I talked with someone who worked with Nick after the memorial service.

Also - the Berg family wasn't allowed to meet his remains at Dover Air Force base (I'm not sure if they wanted to), but his body was indeed turned over to their funeral home after it arrived. The Wikipedia statement that his family was "not permitted to view the body" is false.

Yes, it's an odd coincidence about Berg sharing his laptop with an acquaintance of Zacarias Moussaoui - but after talking with people who have known Nick for years, I'm sure that's all it is - a coincidence.