Here is another one from the Where is Whidbey Already Archives. A First Look at ObjectSpaces in Visual Studio "Whidbey" (ADO.NET Technical Articles) is an article on MSDN about a brand new feature in Whidbey.

For anyone who has written way too much code, and way too many stored procedures purely for the purpose of mapping your relational database tables to your business object structure... this is going to be for you. These sorts of frameworks have existed before from third party developers... but only if you could afford the heavy price tag that they bring with them.

Here is an interesting tag line form the article:

An O/RM system allows you to persist an existing object model to a given storage medium. You should use an O/RM system because you have an object model to persist. You shouldn't create an object model in order to use an O/RM system.

Why is that? Well I think you will find that using an O/RM system for just about everything will add more overhead then you will be happy with. It will be interesting to play around with. I know the project I'm working on at my current employer devotes a good amount of people resources to the maintanence of a DAL.