Neat demo last week on alternative to word captchas -- cartoon catcha, eg drag hat on top of head, put eyeglasses on face, from Mitsuo Okada of Osaka University

Neat demo last week on alternative to word captchas -- cartoon catcha, eg drag hat on top of head, put eyeglasses on face, from Mitsuo Okada of Osaka University, at Founders Institute, he's at mitsuookada@gmail.com