Interesting read. Are there any good wikis or Internet Communities - guiding Visitors to learn new cultures, behaviors, ethics in different places? It's nice

Interesting read. Are there any good wikis or Internet Communities - guiding Visitors to learn new cultures, behaviors, ethics in different places? It's nice to see a comparison chart on - cost of living, labor costs, a basic meal, hotel rooms(Comparison charts should be - City vs Another-city and Country Level comparisons) And I would definitely pay $$ for such a service.