Announcing your site on other sources

Mailing lists:
Yahoo maintains a huge resource of mailing lists.
Newsgroup:
DejaNews service is a great way to search Usenet newsgroups for particular topics.
comp.infosystems.www.announce is a forum where people post new site announcement.

Web Page Directories:

There are many directories growing every day around the world. Please check at Yahoo. They maintain a huge resource.
Commercial service:

We no longer maintain the list of commercial submission services. If you're interested in commercial service, please visit our sponsor, AAA Internet Promotion, to help keeping this site alive:)

AAA Internet Promotions offers a variety of web site promotions. The program is very interesting. You can ask for a regular directories listing service or even ask them to write PR letters sending to newspapers and magazines
to promote your site. (Click on the above banner to visit)

You can also find the lists of commercial submission services at Yahoo and webreference.
Miscellaneous:
Give your site an award.
Free submissions:
Gelon.net - Use this JavaScript to register you page in popular search engines.
Submit Express - Free website URL submission to more 40 top search engines and directories
Bizpromo.com - You can fill out one form and submit your site to all of major search engines at one time!