We just released version 1.8 of the .NET Library for Google Data APIs which adds brand new service classes and samples for the following three APIs:
The library also extends the Email Settings API service to implement new functionality to retrieve the existing settings, support new filter actions and manage email delegation.
In order to improve security and stability, SSL is now turned on by default for all APIs that support it and since the previous major release (1.7.0.1) more than 30 issues were marked as Fixed.