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.
Cashboard appears to be a full featured and mature time-tracking and invoicing system. It’s been about 9 months since the company opened its system up with its Cashboard API in beta, which continues to this day. The customer testimonials are quite persuasive and could lead to removing that manual Excel spreadsheet approach from the equation. After all, we're much more web savvy, right?