AnalyticsApi is a library for communicating with Google Analytics. It has a nice fluent interface that's a breeze to work with.
This will instantiate a new connection to Google Analytics and get the dashboard data between to given dates:
var dashboard = new AnalyticsService(new AnalyticsDataProvider(HttpWrapper.Standard))
.Username("username@gmail.com")
.Password("password")
.Logon()
.Profile(1312231)
.GetDashboard("2011-01-01", "2011-01-30");
Console.WriteLine("PageViews: {0}", dashboard.PageViews);
Console.WriteLine("Bouncrate: {0}", dashboard.Bouncrate);
Console.WriteLine("Visits: {0}", dashboard.Visits);
and so on...