Automated advertising opportunities exist with FollowTheContainer.com.

Simply give your ad a name that is useful for your identification purposes.
Provide the URL that points to the 125×125 ad image on your server.
Enter some text that displays while the image is loaded (Image Alt Text)
Provide the URL that points to destination you want the visitor to go to if they click the ad.
Select either a one-week or one-month run for your ad.
Pay with your paypal account.