Anti-Form Spam code test

I have what looks like a perfect anti-form spam system in place and I need to have it tested. If anyone reading this can post a comment, I'd appreciate it. Any error messages you may get or anything else would also be appreciated. There should not be any, but....

The idea is to create an encrypted application variable that is passed in the comment form to the action page. If it exists and is of the right value, then the comment is from a form. If not or if it does not exist, then the content if from a bot. The application var is re-created on a random basis with extra code to make sure that no one is 'caught' in a recreation.

The system is still beatable by human spammers and bots that actually read a form before each posting.

If it works like I want it too, then I'll post up the code with full examples of use. It's either this or Flash forms. :)