Religious and other belief-oriented topics are definitely a category apart from the usual science- and technology-oriented ones that are the focus of most StackExchange sites. Where much of the questions and answers here will end up focused on personal belief and opinion (backed, of course, by some form of scriptural reference - I hope) the other sites have more hard, definite topics. Where questions on those sites are almost always answerable from a completely objective standpoint, such topics are likely to be much rarer here.
Just as it has been in the real world, it would seem Judaism has existed in the StackExchange network for some time before Christianity got its start. As far as I can tell, it's the only other religion-oriented StackExchange site. Judaism.SE has been around for about three months, so I'm sure they've had their own share of sectarian/inter-denominational conflicts. There's also a few other sites that discuss topics which may be largely belief-based and controversy-generating, such as Parenting, Philosophy, and Skeptics.
If anyone is familiar with the history of these sites, please share whatever lessons you think we might stand to learn from them. Are there any trouble spots that we can avoid, or perhaps navigate through more easily by taking their history into account?