For anyone looking to find accurate and up to date information on vehicles, be it potential car buyers or dealers, Kelly Blue Book provides all the relevant data on car models, features and selling prices. It's an online service with an extensive database of car value data and vehicle information that is based on trusted and official information. The Kelly Blue Book InfoDriver API makes this data available to be integrated with other websites and applications.
There are a number of ways of delivering data in real-time but until recently it has looked like PubSubHubbub, with the backing of Google, was going to be the preferred method. However, the past couple of weeks have seen a couple of interesting developments which could indicate that the developer community may actually prefer HTTP Streaming.