I guess this question is for the resident Codehead Hamidof Unless someone else knows the answer?

I'm working on phasing out ALL spam from my websites and have added a captcha to my forms but I'm still getting spam (through the form) and I just don't know what I can do about it, ironically I thought to post this here after I saw your blog post title in your sig Hamidof because it just happened to be on that very topic.

For the purpose of getting the info out there would you mind sharing your own techniques for zero spam, or is that just wishful thinking?