I work on the Entity Framework Team at Microsoft.
Samir, a developer in the Data Programmability Team started blogging today.
He also published a sample application with a unique feature: It can switch between Entity Framework and LINQ to SQL for persistence. He actually uses a Strategy Pattern (my beloved one) to isolate the business logic from the persistence concern. He describes how it works here.
If that is not novel enough, his application is a graphics editor named SketchPad...
If you haven't already, look for other samples and extensions in the ADO.NET Entity Framework and LINQ to Relational Data Portal in CodeGallery.
The people I work with never ceases to amaze me!