Yahoo Local is offering one month free to promote their new & improved Yahoo Local. That means you can sign up, sponsor, and feature your website in as many local categories for one month and not pay anything. Yahoo Local does not have any long term contracts so you can cancel after 29 days and not pay a dime.
You can sign up here: http://listings.local.yahoo.com/prlfl_v2.php
The first page of Yahoo Local’s sign up page is important for SEO purposes. Your business name & products & services you offer are important. Your company description is not. Yahoo Local is starting to list their local listings ahead of their web listing so being listed is now very important.