Think Christian reported on English site Bite My Blog publishing the Bible Style Guide. Why does it matter to you, besides our contractual obligation to let you know of anything with “Bible” and “style guide” in the title?
To help you never look like an idiot. It contains an A-Z of biblical terms, brief ecclesiastic explanations of different church types and different ways of looking at the Bible. A brief look through here on a regular basis will remind you to avoid assumptions and mistakes, and it might inspire you to kick your design up a notch, too. (Though watch out for that pesky Brit spelling!)
If you have an aversion to clicking multiple links, you can go straight to the .pdf here (2.4 MB).