We've talked about open source beer on here at least once.
At the time I recall seeing a thread covering it, my initial reaction was that the resulting beer would be muddied because of the "too many cooks in the kitchen" aspect of it, but at that time the idea was just kind of being kicked around and no real procedure had been decided regarding how changes would eventually make it into the "official" recipe.
No two brewers are going to produce the same beer even when following the same recipe, so individuals' opinions of what needs to change in the recipe are biased because of the actual beer they produced. In other words, if 10 people brew a recipe, those 10 people will think 25 different things need to change in the recipe.
If you submit that to the master recipe maintainer, he might try some of the suggestions, get his own beer that is (again) unlike the beer anyone else brewed, and will have a biased opinion on which suggestions make it into the newest revision.
It's a geeky idea, which is fine (I'm a geek from way back), but I think it's no more than that.