I feel like I am beating a drum, but this is another case of looking for an affiliate program.
In terms of articles I would search affiliate marketing. Off the top of my head, I can think of some people who cover the topic: John Jantsch http://ducttapemarketing.com Joe Jaffe (Flip The Funnel, a book), Andrew Chen http://andrewchenblog.com Chris Brogan http://chrisbrogran.com/
Also, Dropbox has done an amazing job describing their referral system (which, I would technically consider an 'affiliate program')check out the presentation here http://www.slideshare.net/gueste94e4c/dropbox-startup-lessons-learned-3836587
Programs come in different shapes and sizes, just as your product or service. Just make sure that you measure your customer acquisition cost --and make sure there is ample room for a profit!