This is really a great idea and surely something that people need that deal with trades on a daily basis. In the beginning I'm sure it can be functional and not pretty or easy to use, those things can come later after the infrastructure is in place.  This concept would have a place in many different places not just cryptocurrencies. In the long run if it is easy it could really have a huge impact. It would be amazing if a contract could be created that would actually hold up in court and set a legal precedent.

The tips address in your sig does not say what coin it is, you should try to include addresses there for as many coins as you can to increase potential donations. This could be a large project that putting something up on kickstarter may be worth it. That route may allow this project to really get off the ground and become reality.

I was also curious why you decided to make a new account for this. Were you not a well established member of the community with a solid rep? It may have helped push the idea forward faster being a respected member of the community versus an unknown. I'm sure you have your own reasons for not wanting to mix things and I also can respect that.