Your number 2 is interesting. My company actually basically does this. We crawl the UK web for business sites, incl. retail and hospitality/leisure and suck out

Your number 2 is interesting. My company actually basically does this. We crawl the UK web for business sites, incl. retail and hospitality/leisure and suck out contact details, addresses, products, services, food & drink items on menus, opening times as well as a few other things. We're looking at making available an API.