That is a great idea, Bob....maybe offer new customers the option of a free domain registration or the hosting of one additional domain for one year on signup. This would allow people to choose their own registrar if they like and allow those with no preference to take advantage of, what I think, is one of the best ways to bring in new hosting customers. The person just entering the world of hosting is often someone who has either just registered a domain, or is preparing to register a domain.
Not to harp on the college student thing, but it seemed like a good temporary promo, but the domain thing is just more relevant and appeals to a much larger group of potential customers. Besides, college students aren't known for having large disposable incomes anyway! I know from experience!