I found some tips that may help you out.
From the site:
"Sites like digg.com, reddit.com, stumbleupon.com etc can bring you a LOT of traffic. How about getting 20,000 and more visitors a day when your listing hits the front page?
Getting to the front page of these sites is not as difficult as it seems. I have been successful with digg and del.icio.us (and not so much with Reddit though the same steps should apply to it as well) multiple times and have thus compiled a list of steps that have helped me succeed:"
hxxp://www.webconfs.com/get-traffic-from-social-bookmarking-sites.php
And heres another thread you may wanna look at:
http://www.blackhatworld.com/blackha...g-blaster.html