This thread reminded me of an article I read a while back. Just to play devil's advocate, here's a quote from Nine New Customer Rules: If you want to play, you'd better know the score.
No. 5: Customers expect your advice and assistance in running their businesses. Your customers are as lean and harried and overwhelmed as you are. Which means that any help you give -- whether by providing inventory management or marketing research assistance -- will separate you from your competition. Customers likely won't pay you for your consulting expertise, but they'll increasingly choose you (or other partners) on the basis of nonproduct value.