I just created the islam tag with the following short description (still in peer review):
Questions relating to Islamic culture and traditions and how they pertain to the workplace
We've had a few questions from Muslim individuals who had had trouble interacting in other cultural contexts because of their religion - and thus not covered by middle-east. For this reason I believe it's a good addition to our taxonomic vocabulary.
To be clear, I see Islam as a culture, not a religion, and it is the culture that interacts with itself and the rest of the world. The tag is about the culture - which is largely uniform.
Let's see if we can make it viable. I remember a particular question answered best by Kilisi which would be a good example for it - but I wanted to get the community's opinion before I go on an edit spree.
cryptography
tag, for which we also have a site :) My intention for this tag was the cross-section of culture and business, specifically observant Muslims in foreign cultures