I'll suggest that bypassing Gatekeeper for an unknwon app from an unknown developer is a bad idea. I'll wait until they implement official code signing from Apple.
thats pretty unfair to the devs. You need a Developer ID through Apple, a mac, and you need to pay. Thats kind of a ridiculous expectation to begin with. Two of those things can be solved with money (a significant amount of money mind you, for the purpose of releasing a single application) and Apple can arbitrarily make the Dev ID process arduous and painful.