I hate to be so blunt, but I think you need a wake-up call. There is absolutely zero reason to give an ounce of thought to titles right now. The three of you

I hate to be so blunt, but I think you need a wake-up call. There is absolutely zero reason to give an ounce of thought to titles right now. The three of you need to be laser focused on adding the maximum value with every action the three of you take. Talking about what a role entails at this point is purely "playing house" (in pg parlance, see http://paulgraham.com/before.html http://paulgraham.com/before.html). If you need to put on a fancy title in order to close a deal then so be it, but other than that you all need to execute on whatever are the most important tasks, delegating to whomever is most capable of each given task. That is it; don't overthink it or your startup will fail while you sort paperclips.