P.S. - Matthew just turned on the ability to add banners in the member's area.
To enter a banner into the system, you need two urls for each banner.
The Banner Image URL is the url for the actual picture of the banner. This usually ends with a .jpg, .gif, or .png.
The Banner Link URL is the website you want to send people to when they click on your banner. This is usually your referral url for whatever program you are promoting with the
banner.
Free Members can have up to 10 active banners. Premium Members can have unlimited banners. That's why I always suggest you to get a Premium Membership.