Saw this Web site on Kym's blog (who apparently saw it on another friend's page) and I love it. Am considering using it as a mandatory dating test as well (homonym mix-ups drive me batty), as if I don't already have enough of those!?
What's so great is that I have passed it everytime I've tried, unlike normal captcha, which I pass about one in every five. (Who came up with that word anyway "captcha", there are so many different ways of pronouncing it?)