Issuing Press Releases is a great way to get your website showing up in the search engines and very effective. Get it right and your press release can bring your traffic for years after submitting and you can integrate video, podcasts on many.
Some are free, some are not:
http://www.pressreleasemonkey.com/wp-prm/prm-login.php
http://www.clickpress.com/releases/
http://www.freepressreleases.co.uk/
http://www.pressequalizer.com/