Google has recently released their Data Export API, so that developers can pull out data from Google Analytics and refine the results of the request using query parameters.
Although not accessible from the GData developer guide, the .net Analytics Implementation and samples can be obtained from the Subversion of the .NET library for the Google Data API at http://google-gdata.googlecode.com/svn/trunk
The library comes with the source code for the Analytics implementation and a sample which allows you to log in and pull PageView data for your Site profiles and can be modified using Google Analytics Dimensions & Metrics reference.
One of the main contributors for porting the Java implementation to .NET Morten Christensen has described how to use Google.GData.Analytics in a CMS such as Umbraco:
http://blog.sitereactor.dk/2009/06/05/google-analytics-for-umbraco-first-beta/
Google Analytics Developer guide http://code.google.com/apis/analytics/docs/gdata/gdataDeveloperGuide.html
Google Analytics Dimensions & Metrics Reference
http://code.google.com/apis/analytics/docs/gdata/gdataReferenceDimensionsMetrics.html