Yes, MM is now in the script biz!
First out is
Code Verifier (better name, anyone?)
This one can be used to add image verification to any sort of website/submit page (not just adult)
See some examples of the script in action here:
http://www.cumslutworld.com/php/validate/test.html
As you can see, the script allows you to generate very different-looking codes, making sure that autosubmitters won't be able to read them.
Use any font, colors, size and character set you want + a bunch of effects if you like.
Prize: $30
Payment by Paypal or Epassporte.
Installation can be done in 5 minutes or less. Your server needs PHP support, but all servers should have that these days.
Of course you can change the message/page shown when the code doesn't match to whatever you want.