Two of the biggest brands in local search are partnering and they're using open APIs to do it. Citysearch is including sponsored ads from YP.com (Yellow Pages) in its CityGrid ad network (our CityGrid API profile). Additionally, Citysearch reviews show up across the YP.com website.
Mobile commerce is a huge business opportunity because, at least in the United States, there is not much infrastructure to support it. That's why mobile platform company Appcelerator recently announced its integration with the PayPal API. Now iPhone, Android and iPad developers using the paid version of the company's Titanium framework also get the ability to conduct mobile commerce.