To me, one of the most challenging things of working with web developers is trying to convey the concept of 'thinking like the customer' and designing for usability, not just for the sake of technology. Oddly enough, the arguments are sometimes just as tough when facing the CEO, at least when it comes to the topic of the ROI of web site Usability.

Here's is Rashmi Sinha's has astounding set of links to articles about the usability/ROI connection.
via Lockergnome