If you use Ad Exchange, you're going to want to listen up. Google is making some new resources available to developers that should make your lives a lot easier.
The first and most important change is that the Ad Exchange Web site is now integrated with Google's developers resource site. This allows Google to provide better support for those working with the various APIs involved with Ad Exchange. Some of the features you're going to find on the new Web site are details on the SOAP API, REST API and the Real-Time Bidding Protocol.
Google is now giving Ad Exchange developers access to the REST API. It will give you the ability to "manage your RTB account configuration, submit creatives and list direct deals. Google suggests that you try out the API with their API explorer tool before you dive into making applications with it.
If you still have questions, and you probably will, Google directs developers to the Ad Exchange API forum. If you don't need any help, you can give help to other developers that do need it. Remember, sharing is caring and sharing your developer knowledge is the best way to show that you care.