From reading these forums in the past, I know that uniqueness is a key to getting listed. I wish we could include a "why I think my site is unique" abstract with our URL submission---something to try to catch an editor's eye. I submitted my site http://www.knowledgedoor.com a year ago without a listing, and I wish I could have included an abstract like "Only site that can convert mathematical expressions directly to metric. Only site that can do dimensional analysis of unit expressions. Only site that can do base conversions of rational numbers, etc." I don't think this kind of info is probably what you want in the brief site description that goes into the listing, but it might help quickly decide about a site. I know that the site design should try to do this, but I hate to put too many "marketing slogans" on the home page. I think it would be helpful in areas with a lot of competing sites---I can imagine a busy editor saying "unit conversion, ugh, we've already got plenty of those". I'll be adding more content soon and I bet I'm not alone in wishing that I could include some bullets in my submission about why I think my new material is unique. I really think a feature like this would aid the editorial process; an editor could always just ignore the extra info if he or she wanted to.