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http://www.topseos.com/
Directory of website optimizing firms with request for proposal submittal.
Keywords:
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http://www.sempo.org/
Case studies, articles, events, and a comprehensive directory of search engine marketers.
Keywords: cpc, ppc, sem, sempo, seo, cost per click, pay per click, search engine marketing, search engine optimization
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http://www.seolist.com/
A directory of optimizing firms and marketing pros.
Keywords: search engine marketing, search engine submissions, sem directory, sem pros directory, seo directory, seo list, seo pros directory, website submission, website submission services, website submissions, search engine optimization
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