I have noticed that when signing up for the wiki sites you use the cat images captcha. I'm not blind myself, and i don't know much about how blind people use a computer, but I do wonder how a blind person would manage to solve this. Perhaps there is a way, but I thought I'd mention this in case it has been overlooked. I have seen other alternatives where it is possible to play back the captcha as audio, but I assume that won't work with cat images.
Regards, Robin
