Comprehensive BDC Overview

Recently I have come across a set of article about BDC. I haven't seen anything more informative yet.

Here it is:

Part 1, BDC Purpose and technical architecture

Part 2, Application Definition File (ADF) and its Development

Part 3, Developing an ADF to Connect to Web Services

Part 4, Consuming Business Data through Web Parts and SharePoint Lists

Part 5, Implementing Enterprise Search with Business Data

Part 6, Integrating User Profiles with Business Data

Part 7, BDC Object Model