Photo sponsored by: link?
I am looking closely at Photopost. I'm curious to know if it is possible to include a "Photo sponsored by:" link with every image? Or even better, a way to include a custom banner under each photo?
 I upload a photo of a canon digital camera.
 And insert code like this: <a href="www.amazon.com/canon_camera.php">Buy this camera here</a>
 Or a banner code like this: <a href="www.amazon.com/canon_camera.php"><img src="http://www.mysite.com/banner.gif"></a>
 The text link or banner is displayed immediately under the photo.
Is this functionality already built in? Or could it be done with BBCode somehow? Thanks!