There are very few people who have room on their desk to hold all their peripherals. From external hard drives to printers, you need a lot of real estate to build a proper home office. We modded a rolling tea cart a few years ago (republished as a Home Hack) to hold and hide our modem, router, and printer. Jared did the same to a metal cart for his gaming systems. Looks like good ol' Martha took our cues and made it a good thing.
MarthaStewart.com turned a standard rolling cart into a mobile office that holds a printer on the top shelf and features built in drawers for storing ink cartridges, staplers, paperclips, chargers, or whatever else you need in your home office. Since it's on wheels, you can push it into a corner when you don't need it, clearing up some room around you.
While Martha suggests buying a rolling cart from an industrial supply company, the site doesn't suggest a particular model, so we trolled around online and found a few options. Most of these are a bit pricey, so if you're on a budget make sure to check your local craigslist postings or thrift shops for rolling carts that need a new home.
Red Rolling Metal Tool Cart from CableOrganizer.com -- $127.
Blue Rolling Metal Tool Cart from SJ Discount Tools -- $65.
Open Studio Paper File from Dick Blick -- $350.
Molger Cart from Ikea, just add a small piece of wood to act as a tabletop -- $50.
Stenstorp kitchen cart from Ikea -- $200.
Go-Cart Three Shelf Table from CB2 $130.
Steel Push Carts from Uline -- $113.