captcha OCR solution

Looking for someone to create an OCR solution (preferably in JAVA or as a web service) that will use some/all of the following steps to improve accuracy: -image preprocessing -separation of letters -recognize letters (using a neural network) -build word from letters -dictionary attack The program/service to be set up to accept and image and return the decoded answer. Limited to 2-3 captcha libraries with one being recaptcha. Goal is ~50% success rate. Budget for this price is negotiable depending on quality of finished product.