jthompson-some companies are going to the communal work station concept. If their employees are only in the office a couple days a week, they give them a rolling file cabinet, and then the employee occupies a work station just for the day, bringing their rolly thing with them. Enables companies to use less floor space, fewer pieces of furniture. I never hear how they manage to coordinate keeping the right number of people in or out of the office. Personally, I have so much reference material that I would need a rolly 8' high. (I've tried scanning docs, but I still have a lot of books)
Also, as francesca mentioned, places are not putting up cubes or dividers, and just have desks scattered around. I find it hard to concentrate in that atmosphere. There is always someone who hasn't learned to use his/her "indoor voice" on the phone. If I worked in a place like that, I would work from home more often. I kinda like having to get up away from my desk to talk to a co worker-gives me a break, as we do not have formal breaks.
Plus, a private office lets me confine my dog when I need to. Yup, he comes to work with me.