please help not showing up

[rjp2k]

i maintain a site shopadf.com. The site went live last year and have been linkbuilding and optomizing the site for 5 months now. I am showing up in MSN, Yahoo and very slightly in Google. I am in the process of marketing our affiliate program. Have not gone to CPC yet on any SE's. Everyone i talk to says i have a good looking site and I should be picked up in SE's. Any help is appreciated.

If I am in the wrong queue please let me know. But I have seen my site under keywords such as diamond jewelry, diamond engagment ring, etc and at pages 6, and on, not high on the list but showing up. On Yahoo and Google I cant find my site under any search terms.

Also I have tried to follow all whitehat SEO techniques, and to be w3c complaint. Also have done my usability testing as well.

Please help!!!!!!!!!!!!!!!!