From DHL-USA.com:
QUOTE:
We know you have a choice in shipping, and we want to be your first choice. Please complete our survey and help us better meet your shipping needs. As a thank you, we’ll send you a FREE overnight shipment.† And while the free shipment might get you started, our convenience, responsiveness, and reliability will keep you coming back for more.
It asks for the name of the business you work for, the number of employees, and a few questions about the company's shipping habits. You don't have to be the person who decides the company's shipping suppliers, but I'm unsure whether putting "n/a" for business and 0 employees (and marking off your personal shipping habits) would be valid.
Link:
www.dhl-usa.com/dom/ship.asp?tcode=LCWFS
It doesn't say what the exact terms of the offer are (weight restrictions, which overnight service, etc.) but when you complete the survey, it says the offer will arrive in 2-3 weeks.