I am planning on writing a series of articles about the Microsoft CRM v1.x User Interface.  I have just posted "Part 2 of 4" and "Part 3 of 4" (the juicy one).

Check them out in the "User Interface" Articles section or here:

http://blogs.msdn.com/aaronel/articles/230420.aspx

http://blogs.msdn.com/aaronel/articles/230427.aspx