Dmoz is the Internet's largest directory system (over 3 million web sites) and is maintained by human editors. A web site listing in Dmoz can also be an important part of having a web site rank well in Google, because Google uses Dmoz results in it's own directory.

Homepage - http://www.dmoz.com/

Advantages of Dmoz are

• Better relevancy than non-human edited directories and search engines.
• Do not rank, promote or optimize sites, simply a data provider.
  

Disadvantages,

• Abuse by editors (not often)
• Can take a long time to have your site reviewed

• Make sure your site has original content and isn't a clone of other sites.
• Make sure your site is error free and the design layout is easy to use.
• Check for spelling and general mistakes on your site.
• Submit your site to a relevant categories, otherwise your submission will be delayed.
• Submit your site only once and if you want an update on your submission check the public forum at - http://www.resource-zone.com/

It's easy to become an editor at Dmoz, all you have to is,

• Find a category that you would like to maintain.
• Click the Become an Editor link at the top of the category page.
• You will then have to find 2 or 3 sites to add to that category and explain your reasons why you wish to edit in that category.
  

Facts about Dmoz

• Owned by AOL
• Hosted and administered by Netscape Communication Corporation
• Self-regulating community
• Serves results for search engine Google
• On 08 / 01 / 2004 Dmoz had,
  • 4,008,147 sites listed
  • 60,112 editors
  • 533,951 categories