How important is usability? Even the New York Times talks about it, reviewing a new router, network storage device and digital picture frame (yes, you read that right, digital picture frame):

D-Link's PR person suggested that the elusive instructions might be on the company's Web site. (They weren't.) In the end, it took a D-Link product manager a day to figure out how to work these features himself and supply me with the instructions. He says that he'll have them posted on D-Link's Web site by the time the 685 goes on sale. (Caution: They entail mucking around in the router's advanced HTML-based configuration pages. Technophobes need not apply.)

Seriously — if the product manager can’t figure it out, you have a problem.