One of the best architects/developers/people I've ever had the pleasure of working with has finally started his own blog! I've been encouraging (okay...prodding) him to do this for awhile, because he has a lot of knowledge that other developers can definitely benefit from. Although he expressed some concern about not having any topics to write about, he seems to have overcome that problem as he's already made three posts today! I've been working with him on the NxOpinion project for the past year-and-a-half, and I hope he has a chance to share some of his object-relational mapping experience with you sometime soon.
Check out Objects, Systems and Everywhere in Between. While you're there, don't miss his post on the relatively obscure and esoteric C# Global Namespace Qualifier (otherwise known as global::).