From Wikimmunity

Wikimmunity.org offers direct advertising services available on every article page. By clicking on the link "Advertise on this page" in the footer of each page you can create a featured ad listing containing a phone number and address for your business or organization. Rates are reasonable, starting at $20 for each 6 month period, $35 for a year long listing, and a $50 monthly charge for a listing along the left side panel, visible on every page load. The featured listing will look similar to the example below:

Your business or organization will benefit by being associated with Wikimmunity.org and allowing more customers to recognize and use the products and services your organization has to offer. Create your listing today. Simply go to the page of your article about your business or organization and click on the link in the footer "Advertise on this page", or create a new page for your business or organization and once it's complete, include your ad by clicking on the "Advertise on this page" link.

Payment is simple using industry standard PayPal and can be made through your PayPal account or by Visa, Mastercard, Discover, or American Express via PayPal.