I guess I need to look at a motorhome the next time I am at an RV dealer. To meet code it would seem like they would need a lot of outlets.
Actually, it's not as many as you might think. Walls occupied by fixed furniture and cabinets are exempt, which, in a factory RV, end up being the vast majority of wall areas. Fixed gas appliances such as cooktops, ovens, and refrigerators further exempt those areas. So it ends up being countertops, one every six feet, nightstands, and kitchen and bath areas as defined. Most factory rigs can get away with a half dozen or so receptacles. (Pre-wire for roof airs and the like are normally unconnected wires, not receptacles.) If they keep the total circuits down to four, and have a non-electric water heater, they can get away with a 30-amp shore cord as well.
I know I need more outlets and will have to study the code. My travel trailer was a 2002 so the code it met is fairly current. I probably don't recall everywhere it had outlets.
A 2002 trailer would have been based on the 1999 code, nearly a decade older than today's 2008 code (the code comes out every three years). That said, the RV section underwent it's biggest revision between the 1996 and 1999 codes, where large chunks were revised, and the article on vehicle-mounted generators was moved into the RV section.
I quoted most of what you need about outlet locations in my earlier post, at least as far as I could without infringing copyright. If you have more specific questions, post them here and I will try to answer based on my copy of the code.