DDD and ORM blog posts of note...

Ted Neward has a great post that compares ORM to the Vietnam war. http://blogs.tedneward.com/2006/06/26/The+Vietnam+Of+Computer+Science.aspx

And Paul Gielens on Domain Driven Design http://weblogs.asp.net/pgielens/archive/2006/10/20/Swear-by-a-Domain-Model.aspx

and on the database's role http://weblogs.asp.net/pgielens/archive/2005/09/11/424836.aspx

and a great comparison of DDD vs Microsoft's Three-Layered Services Application (their standard architecture used for PetShop and others). http://weblogs.asp.net/pgielens/archive/2006/08/08/Organizing-Domain-Logic.aspx