Joost de Valk is a professional SEO, who had written an very interesting guide about how to optimize your WordPress blog.
In this WordPress SEO guide you will find very important tips to improve your ranking with simples techniques.
Here are the topics
1. The basic technical optimization: simplest stuff, highest rewards

Permalinks
Optimize your Titles for SEO
Optimize your Descriptions
Optimize […]

If you are a WordPress designer and want to sell or promote your job, I’ve compiled a list for it.

http://www.finthemes.org
http://board.themevibes.com/wordpress-themes/
http://dinothemes.com/
http://forums.digitalpoint.com/
http://forums.ukwebmasterworld.com/
http://freewpthemes.info/
http://hostbidder.com/
http://ithemes.org/
http://templatenavigator.com/
http://themebot.com/
http://themes.blogflux.com/
http://themes.iwebnet.org/
http://themes.mygreencorner.com/
http://themes.rock-kitty.net/
http://themespack.com/
http://web2feel.com/
http://webtalkforums.com
http://wordpress.mu/
http://wordpressgallery.com/
http://wordpresssite.com/
http://wpskins.org
http://wptemplates.org
http://wptheme.net/nt-velvetcubes
http://www.9mb.com/forums/
http://www.adminfusion.com/forums
http://www.affiliatelink.org/
http://www.allnukestuff.com
http://www.bgthemes.com
http://www.bloggeries.com
http://www.bloggingthemes.com
http://www.blogoxide.com/
http://www.blogskins.com/
http://www.board.themevibes.com/wordpress-themes
http://www.csschat.com/
http://www.designerstalk.com/forums
http://www.devhunters.com
http://www.deviantart.com
http://www.estetica-design-forum.com/
http://www.experienceadvertising.com/forum/
http://www.freehostforum.com
http://www.freelayouts.com/
http://www.freewordpressthemes.com/
http://www.freewpthemes.info
http://www.fresheezy.com/
http://www.iguides.org/forums
http://www.iiera.net/forums
http://www.ithemes.org
http://www.johntp.com/wp-skins/
http://www.loreleiwebdesign.com
http://www.mygreencorner.com
http://www.namepros.com/
http://www.nameslot.com
http://www.nowg.net/
http://www.osskins.com/
http://www.phproxyskins.com
http://www.satinder.net/themes
http://www.sponsoredtemplate.com/
http://www.talkdev.com/
http://www.talkfreelance.com
http://www.talktheme.com
http://www.talkthemes.com/
http://www.templatenavigator.co
http://www.templatesforums.com/
http://www.thatsprofound.com/
http://www.themeboss.com/
http://www.themebot.com/
http://www.themehq.com
http://www.themereleases.com/
http://www.themes.blogflux.com/
http://www.themes.iwebnet.org
http://www.themes.rock-kitty.net
http://www.themesbase.com
http://www.themespack.com
http://www.themestudio.us/
http://www.themes-wp.com/
http://www.themetube.com
http://www.thewebmasterstop.com
http://www.top10wordpressthemes.com/
http://www.toptut.com/
http://www.topwordpresstheme.com
http://www.v7n.com/forums/blog-themes/
http://www.web2feel.com
http://www.webdesignerforum.co.uk
http://www.webdesignforum.com
http://www.webdeveloper.com/forum/
http://www.webdevforums.com/
http://www.webmasterarena.ws
http://www.webmaster-talk.com/blog-themes/
http://www.webtalkforums.com/
http://www.widgetreadythemes.com/
http://www.wordpressgallery.com/
http://www.wordpresssite.com
http://www.wordpresstheme.in/
http://www.wordpressthemed.com/
http://www.wpflx.com/
http://www.wpskins.org
http://www.wpsnap.com/
http://www.wptemplates.org/
http://www.wptheme.net
http://www.wptheme.org
http://www.wpthemesarchive.com
http://www.wpthemesfree.com/

Please let me know about others sites to add into my list.
Share and enjoy!!

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Link bait is any content or feature within a website that somehow baits viewers to place links to it from other websites. Attempts to create link bait are frequently employed in the overall task of . Matt Cutts defines link bait as anything “interesting enough to catch people’s attention.” Link bait can be an extremely […]