To contact our support team, just use the 'contact' link at the top of any page on our site.
Individual contact forms for our users (such as the one linked from my nickname on the forum) have been temporarily disabled until we can finish implementing a more robust CAPTCHA to block automated form submissions, due to a recent rash of spammers trying to abuse our contact forms to spam our clientele (about products the spammers were also selling via E-junkie -- some nerve!).
This help page explains everything you'd need to know about setting up and using our built-in affiliate system:
http://www.e-junkie.com/ej/help.affiliates.htm