Say you make a random mailbox (hotmail, gmail, whatever).
Then you put the corresponding address a bit everywhere on your blog, your web pages, but styled so it’s in visible (display:none).
Then you install a little application, and you give it the necessary data to retrieve the mail corresponding to that address (pop, imap, whatever).
This application parses incoming mails, stores the ip’s and addresses in a file. At the end of every month, this file gets sent automatically to a few spam blacklisters (ideal format to be examined).

This application is spread as much as possible, on as many platforms as possible.
Do you think it could work ? What would be your suggestions ?