The Google Analytics Data Export API beta is now publicly available to all Analytics users! "With the Google Analytics Data Export API, you can develop client applications that download Analytics data in the form of Google Data API feeds. Your client application can use the Data Export API to request data from an existing Analytics profile for an authorized user, and refine the results of the request using query parameters. Currently, the Data Export API supports read-only access to your Google Analytics data."
More info: Google Analytics Blog