This probably won't make it into the initial release, but I would really, really, really like support for no-SQL databases, in my case, specifically for MongoDB. RazorSQL has limited support for MongoDB that tries to shoe-horn it into a SQL/tables mindset. That's not the path I hope you take. RoboMongo is much, much closer to what I hope you guys can implement.
Regardless of whether you implement no-SQL support, this is a great idea for a product. I think you guys can easily create an awesome database development tool.