This is the underside of my Palermo office desk (you can find more details about my office setup HERE).
Seven and three quarter inch neon orange nylon wire ties were used to mount the power brick, power strip, and backup hard drive to the underside of the pegboard. You can see what the rest of the desk looks like from behind HERE. All parts and accessories were purchased at The Home Depot and Fry's Electronics.
The photo is for my Declutter The Mess Under Your Desk! blog post.