Second, the advice here is to not pitch the idea when you first meet potential technical co-founders. I disagree: I think sharing the same passion is key, so you definitely should tell me that you plan to revolutionize the music industry (a bad example, I know...). Small talk won't get me, the developer, interested.
As to the original question, if you are starting from zero and you want a means of avoiding critical shareholder deadlocks, you can split 45/45/10 with the smaller portion going to a party both founders agree will be impartial. This person can be the initial angel, or perhaps a minor founder who accepts a smaller chunk in order to maintain his dayjob.
You can also maintain 50/50 splits of ownership but still break executive deadlocks via a third vote by mandating a third seat on the board. This won't help fundamental shareholder deadlocking, but disagreements rarely go to the shareholder vote level.
http://sethgodin.typepad.com/seths_blog/2009/03/advice-on-eq...
Though he makes it seem easier than it really is.