******************* I'LL ECHO EVERYONE ELSE ******************* 100 backlinks is enough if the competition for the niche is low and the quality of the backlinks are high. Getting more links from lower quality sites helps your traffic some but not PR and you end up with diminishing returns on your efforts. Try getting content with a link back to your site out via RSS feeds (this is recommended just too infrequently on this forum) and press releases. The links get picked up automatically by higher quality sites.