While we certainly are using technology to help solve the problem, it's more about creating contracts in a way that helps you focus on the key changes from contract to contract. When you build on immutable terms, and the only changes are in the contract's cover sheet, you can focus on the changes and not hunt down for words inside of an inscrutable PDF.
Are your founders lawyers, by chance? It seems like you understand the customer pain, but it's possible that creating a fix for this pain requires an intimate knowledge of how the legal community will react. As GP stated, this could be a social problem, and in that case it is one that is caused/perpetuated by lawyers. Or it could just be a matter of incentive misalignment.
Having deep insights into the mindset and financial incentives of lawyers would seem to be key here (but if you're funded by YC, presumably you've already been asked this question and come up with a good answer!).
