How much will it cost to hire that cabbie? The Yourtaximeter API gives access to such precise data that cab companies in the UK rely on it to give quotes. Yourtaximeter provides a tool anyone can use to calculate a fare. The API documentation, other than providing a link to where you can get an access key and noting responses are flexibly delivered in JSON or XML, is rather skimpy. That's actually a complement: minimal documentation reflects the fact that no coding skills are required.
Roomorama is not the only one in the person to person travel accomodations game. The company is in a space that’s been well established by other players: CouchSurfing, Vacation Rentals By Owner and, of course, AirBnB. While there's an AirBNB API planned, the only room rental site that is currently public with its platform is the the Roomorama API.