Here is a list of manual submission blog directories for improve search engines ranking.
http://www.blogsrating.com/submit.html
http://www.blogsearchengine.com/submit-blog/
http://www.blogtopsites.com
http://www.blogtoplist.com/submit-blog.html
http://www.blogs-collection.com/
http://www.crayon.net/
http://www.globeofblogs.com/
http://www.quickblogdirectory.com/
http://www.search4blog.com/submit.php
http://www.technorati.com/
http://www.wilsdomain.com/blogs/
http://blogadvance.com/
http://blogexplosion.com/
http://www.blogoriffic.com/add_blog.php
http://boingboing.net/
http://www.5starblogs.com/
http://www.biggerblogger.com/
http://www.blogdir.com/
http://www.blog-directory.org/
http://www.bloghop.com/
http://www.blogion.com/
http://www.blogscholar.com/
http://www.blurtit.com/
http://www.getblogs.com/
http://www.icerocket.com/
http://www.sarthak.net/blogz/
http://www.blogdigger.com/
http://www.bloglines.com/
http://www.blogpulse.com/
http://geekphilosopher.com/MainPage/blogBPLinks.htm
http://wutzle.com/
http://www.blogcatalog.com/
http://www.blogpoint.com/
http://www.blogrankings.com/
http://www.esperanto.se/kiosken/en
http://www.rateitall.com/
http://www.feedmap.net/BlogMap/
http://www.headlinespot.com/