Yes, it does and one must ping each time a new post is made on the blog. Pinging services distribute the RSS feed to many other places, bringing you more readers and targeted traffic.

Have a look at this hot list of pinging services and add them to your wordpress options.

Here’s a list of PR 6 (Till now) Blog Directories. If you own a PR 6 blog directory, and it’s not listed here, please let me know at  blogsgeek(@)gmail.com I’ll duely add your directory in the list.

http://blogs.botw.org
http://www.lsblogs.com
http://www.blog-search.com
http://www.topblogarea.com/
http://www.britblog.com
http://www.findingblog.com
http://www.weblogalot.com
http://www.globeofblogs.com
http://www.leftyblogs.com/
http://www.blog-directory.org/index.php
http://www.bloguniverse.com
http://www.top100bloggers.com
http://www.delightfulblogs.com
http://www.sportsblogs.org
http://www.diarist.net/registry
http://www.bloogz.com
http://www.bloghop.com
http://www.blogwidow.com/
http://bloglinker.com/
http://www.blogsweet.com
http://dmoz.org/Computers/Internet/On_the_Web/Weblogs/
http://www.bloggernity.com
http://www.bloggeries.com
http://www.blogit.com
http://www.blogtoplist.com
http://blogs.botw.org
http://www.search4blogs.com/bloggers/index.php
http://www.index-it.net/blogs/blogs41.html

Currently these are PR 7:

http://www.blogcatalog.com/
http://www.blogflux.com
http://www.blogdigger.com/index.html
http://www.blogrankings.com
http://www.blogarama.com/
http://www.blogpulse.com/index.html
http://www.bloghub.com
http://www.blogwise.com/
http://www.blogexplosion.com/
http://www.getblogs.com
http://kinja.com/
http://www.blogstreet.com
http://portal.eatonweb.com

If you own a PR 7 paid or free blog directory, let me know at blogsgeek(@)gmail(dot)com, I’ll shortly add your directory in the list!