None specifically, you can replace any one of those directories listed by Portprophecy with a link from a high PR page that's not too crowded with other links, or with a good selection of links on medium-PR pages.
So if you can't get a link in Dmoz or Yahoo, it doesn't mean your site will be doomed to obscurity. Just submit to as many free ones as you have time to, and to as many paid ones as you can afford to as long as you believe they will give you good ROI.
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