I've been on the FormSpring bandwagon for quite some time. A solution to help website owners and marketers create online forms and manage the data, FormSpring is one of the few tools I reccommend frequently to those getting started that don't have a lot of coding experience.
FormSpring today announced their new affiliate program. I think this would be ideal for an independent designer or developer to make some additional revenue. FormSpring will set a 30-day cookie which will be stored on the visitors computer and affiliates will earn a 25% commision from sales. The referral will be tracked even if the person referred signs up for a free account and does not upgrade to a paid account for several months. Affiliates will only receive commissions for the first year.