Eric Ward - - Specialized internet promotion and press release services for high-end web site launches.
Majon International - - Offers targeted web marketing promotions and advertising including mall linkings, opt-in email campaigns, web site exposure promotions, pop-up and pop-under advertising, and press release distribution services.
Pandia - - Guide to Web searching and search engine optimization, with tutorials, news, tools, reviews and SE marketing resources.
Sempo - - Non-profit professional association working to increase awareness and promote the value of search engine marketing.
SEO Consultants Directory - - Lists website optimizing companies worldwide by country, US state, and language. Add and review services.
SEO List - - A directory of optimizing firms and marketing firms.
SEOmoz - - Resource by Rand Fishkin, with weblog, articles and free tools. Includes a beginner's guide, an online exam and recommended firms.
SEOpros.org - - Organization of SEOs and marketing consultants developing and implementing a set of best practices for the search engine optimization industry. Includes a database of consultants, consumer tips, SEO skills sets and complaint registry.