How Would You Design a Captcha for the Deaf-Blind?

kesuki asks: "Right now, the state of the art captcha only works for the visually-abled. Some people are trying to start a grass roots opposition to catcha using existing anti-discrimination laws. However, without any captcha at all, spammers would have a field day. Audio captcha would work for the blind, of course, but they still leave out the deaf-blind using brail interpreters to use their computers and navigate the web. What system of captcha can you dream up that would work for the deaf-blind?"

Comments

Had a similar idea

[Nos.]

Okay, this is a shameless plug, but I started work sometime ago on http://aomis.net/ (I won't href it). Anyways, the idea was instead of CAPTCHA, which I don't really like, I thought why not let users identify different types of media. Now, I hadn't considered folks who were blind and deaf, but I did build the system to handle multiple types of media, like pictures and audio, which would help folks that are blind or deaf, but not both.

Now, the sites not quite ready, I'm still playing with a few things, like getting more media into it, but I'll have to watch this Ask Slashdot for good ideas on how to handle those who are blind and deaf.