We have a separate computer room, which is probably a good thing since we have five computers among the four of us. (It used to be six, but my netbook conked out.) I have my desktop computer set up on an old drafting desk I bought at a flea market ten or twelve years ago. Beside me I have two narrow wooden bookcases, holding office supplies, paper, and a bunch of writing-related stuff, including my copies of my books that are in print. On the wall above my desk, I have calendar pages for this month and next month, a list of the projects I'm working on now with target completion dates, and a few other pieces of paper. Higher up on the wall is my cover gallery: print-outs of all my YA and romance covers (except one romance cover that I wouldn't want my children seeing).
I try to keep the top of my desk reasonably neat, but I tend to fail at that.
Katie, I love your desk! I'd post a pic of my area, but it's pretty messy right now, plus my camera and computer have each decided the other doesn't exist, so I can't upload any pics.