One of my post Web 2.0 Expo book purchases was Don't Make Me Think by Steve Krug. I obviously missed the boat as this is now the second edition published in 2005 but it cropped up on one of James Kalbach's slides so I thought I'd check it out. 48 reviews on Amazon with an average 5 star rating was enough for me.
It's everything a business book should be. Short, I've read it in two evenings, and with all of its points clearly made.
There is some really valuable material in here, especially the chapters on how to do useability testing on a budget. I'll definitely be getting the video camera out when I get back to the office.
Having just gone through the process of designing and developing the new Esendex web site I feel that perhaps we've missed a trick.
In reality however we've made some massive improvements and web site design and development should be an iterative process, the trees really do get in the way after a while.