Accessories such as portable printers, fax machines, scanners, and cameras are important for certain types of business travel. Show business travelers how they can pack light by using their infrared ports for connecting printers. Don't forget to show them technology that wears multiple faces. Then, just add software to turn the scanner into an outbound fax. Sell services, too.
Travelers value their time and are willing to pay for installation services or checkups.
A reseller can serve as the traveler's pit crew in between trips. Keep a few spare computers on hand that are configured with the company's standard software. I've had some cases where I broke a notebook during a trip and had a replacement shipped to the airport, waiting for me as my plane came in. This is easy business for a reseller. It only requires a few novel ideas, a partnership with IT, and good service.