We do a ton of research on private label SEO, also known as white label SEO. Here is a recent write-up that we found really cool. See here. They cover some of the introductory notions of white label SEO and private label SEO that you should be familiar with if you are thinking of jumping into this competitive space.
White label SEO (also known as private label SEO) is a classic reseller model where some other organization does the delivery work while you focus on sales, marketing and account management. This has several advantages and disadvantages, so it may not be right for your business. But on the hand, it just might be. In a competitive space, focusing on sales and marketing might be the winning recipe.
Al writes about the Internet and internet-based businesses.