Oh, you seem to have got it then. Are you using a CMS yourself? If so, there may be a script for that. If there isn't one, once you have one coded you may be able to sell it as a digital good and recoup your investment for the coding.
If you don't have the funds for coding the script, I suggest
GLBSE. They just went into Beta about a week ago.
No, I am not using CMS. Hmm... CMS plugin that would allow to track bitcoin addresses is an interesting idea! I do have some free
php example here, but maybe wordpress/joomla/drupal plugin would be a better option.
Regarding GLBSE, I issued
AA asset few days ago... Didn't advertise it though because I am not sure how many I want to sell and what price should be.