I've executed several before. Have investors lined up now and sometimes they require this of you, but I guess you're just smarter than me. Carry on.
Tell more about your past ventures. I bet you will get more candidates if you show that you are really able to bring something to the table.
Unfortunately often these "a non-programmer business guy looking for developers" deals are pretty bad for the devs. I recommend to use common sense before applying, and not sign any NDA before at least you know that the guy is credible.