t's still a ways off, but I really think you want to look at the ADO.NET Entity Framework - that will probably wind up containing more functionality for what you're looking for.It still lacks change tracking at the Entity level, though for a slightly different reason. Doesn't it?
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
