Channel 9 has two screencast that deal with the new geography data type in SQL Server 2008. Saving Virtual Earth Polygons to SQL Server 2008 Marc Schweigert shows you how to draw a polygon on a Virtual Earth map and save it using ASP.NET AJAX, Windows Communication Foundation (WCF), LINQ to SQL, and the new geography data type in SQL Server ...

LINQ to SQL is a built-in O/RM (object relational mapper) that ships in the .NET Framework 3.5 release, and which enables you to model relational databases using .NET classes.  You can use LINQ expressions to query the database with them, as well as update/insert/delete data.   This is the 6th article that Scott Guthrie has written ...