I'm trying to make a directory submission software and it would be really nice if I could add auto captcha solving feature. Anyone... got ideas????
Try decaptcher man. The api is simple and can easily be accessed via .net. But be warned, they are cheap and the solving ratio is crap. Work for me in low volume usage. (100 to 200 / day)
We use http://captcha.biz/asp.net-captcha.html which has a great API, simple to use, lots of choices, and easy to integrate. It isn't that expensive either at $59 for a single web site.
I have trialled decaptcher. I need to keep retrying (average of 2 to 3 times posting) to get a response from their service. When I do get a response, the captcha is almost always correctly solved.
I think the OP is asking how to crack a captcha. The service you've mention is about generating captchas.