It cracks google mail and a few other sites that I have tried it with,
I did want to show you it cracking gmail but it only breaks 10 captcha's a day.
Funny thing is there sign up for is not protected, so you could create a large amounts of accounts to rotate.
There FAQ must be out dated as it works pretty well. It uploads the image as a base64 string to a webservice and then when it has cracked it alerts you and puts it in the clipboard.