I'm not the supreme authority here, but this is my take on your question. If you're talking about apps or widgets you'd like to have that are of a religious nature, that's perfectly fine and on-topic here at all times. If you're attempting to spark a religious debate and want to argue about whose god is #1 or convert people over to your own, that's frowned upon. Reggie and co. are reasonable people, so don't worry too much about the hammer coming down over casual stuff like "god bless you".