2 Tier Affiliate Programs

Net Detective

http://www.harrisdigitalpublishing.com/track_recruit.php?recruiter_id=Fun4TheMoney
This program is from Harris Publishing. They have several products in their referral program, plus this 2-tier recruitting program. Earn $25 for the sales you generate, plus 12.5% of the sales from the folks you recruit. They also offer a free, downloadable web page you can add to your site, to help promote this program. Besides Net Detective, they also offer Geneology Detective and Clean Credit.