Page is a not externally linkable
wangdy - 12:22 pm on May 29, 2002 (gmt 0)
I think somewhere, someone wrote that the most important listing to attain is that of the ODP (dmoz.org) since this is the foundation for much of the search engines.
Like Brett said above, there are five or so worthy search engines/directories to be on. Those are the ones that most people will use and do use.