I listened to some sermons from Covenant Life Church last year on Affluenza (1, 2 & 3).

What is affluenza? Josh Harris explains it like this:

Affluenza is a nifty little word that some clever sociologist created by mixing two different words together. The word affluence means having a great deal of money. Influenza is a highly contagious and potentially fatal disease. When you mash these two together, you get affluenza, which is a useful word for describing the problems generated by a rich consumer culture that has an endless hunger for more and more stuff. Affluenza is the disease of greed. It's the materialistic mindset that says getting more money and possessions is the ultimate aim of life. Affluenza is the spirit of our age, and it has infected all of us.

Josh is currently blogging the text from the first affluenza sermon. In the sermon and the blog post Josh speaks from Luke 12 on the 'Disease of Greed'. Good, challenging stuff.

Affluenza, Part 1: The Real Money Problem
Affluenza, Part 2: The Deception of Greed
UPDATE: Affluenza, Part 3: Greed Destroys Us