Some Resources on Patterns of Data Access with EF

Ayende's thoughts on Repository Pattern.

Prefer educating Developers rather than trying to protect (preventing) them from writing bad code.

Implementing a Repository Pattern in EF

(I'm not convinced by this article. It talks about separation from Data Access but it doesn't look unit testable to me. Check out the fields on the BLL class Repository, how would you mock/stub that?)

MSDN on Testability and EF

This definitely more interesting than the above article, but I still can see how the Intelligent Query Pattern gives much cleaner separation of concerns. Although, I'm only about 90% there. There's still a case (in my mind at least) to still allow simple linq queries direct against EF.

Walkthrough of Test Driven EF 4.0

Using Repository and Unit Of Work Patterns with EF4.0

Ayende on ORM's in general

A long read, but some complimentary points on EF and good insights into NHibernate.

An tiny lightweight alternative to EF PetaPoco (although it appears it relies on SQL strings - yuck).