Blog Directories in the Yahoo! Directory

SplogSpot
Blog search tool that keeps track of spam blogs, or splogs. The database can be queried via an API.
www.splogspot.com
Blogs by Iranians
Directory of Iranians who write their blogs in English.
www.blogsbyiranians.com
Humbug: Periodic Table of Blogs
List of blogs, broken down by category.
www.humbug.com/links/periodic.html
Artiklz
Social search engine allows users to search comments, blogs, and articles.
www.artiklz.com
Ageless Project
Directory of personal home pages, blogs and journals, indexed by site authors' dates of birth.
jenett.org/ageless
BlogMatcher
Program that helps people find blogs that match their interests and find like-minded blogs.
www.blogmatcher.com
Best Blogs in Asia Directory
Provides an index of blogs by country, with ratings based on user votes.
www.misohoni.com/bba
Professors Who Blog
Collection of blogs by academics and professors from Rhetorica.net
www.rhetorica.net/professors_who_blog.htm
Bitacle
Searchable directory and archive of blogs on a wide variety of topics.
www.bitacle.org
Canadian Blogs Directory
Lists Canadian blogs by topic, features notable sites, and offers news from the blogsphere.
www.blogscanada.blogspot.com
BlogTorrents.com
Fresh torrents from millions of blogs.
www.blogtorrents.com
VIPBloggers
Browse blogs by thumbnail picture or search by keyword. Mousing over blogs provides a pop up picture along with a title and description.
www.vipbloggers.com
Birmingham Bloggers
Collection of blogs from the Birmingham and Solihull areas.
www.birminghambloggers.bravepages.com
InfoFindBlog.com
Search blog sites throughout the web simultaneously to find relevant information on any subject. Find only the most useful information with no commercial content.
www.infofindblog.com
Downhill
Based on the links between blogs, tries to find a path between any two you specify.
www.crummy.com/devel/downhill
blo.gs [read review]
Blog directory that tracks recently updated weblogs, letting you keep an eye on your favorite blogs over the web and via email. Or add your blo.gs list to your own personal web page, for a blogroll that shows what's new.
www.blo.gs
BLOGbal
Global searchable blog directory. Accepts free blog submissions.
www.blogbal.com