Does Facebook's Terms of Service allow you to sell ad or banner space on your own tab page or canvas application within Facebook?
Per Facebook Statement of Rights and Responsibilities Section 4:
You will not use your personal profile for your own commercial gain (such as selling your status update to an advertiser).Per Facebook Pages Terms Section 7:
Third party advertisements on Pages are prohibited.Per Facebook Platform Polices Section 3, Sub-section E:
You can only utilize advertising or similar monetization related products or services from companies that appear on this list within Apps on Facebook.com.