If you search on xjt forums i remember a thread about a tailor in the IAH area that would embroider the wings for $10 bucks less per shirt then you can find anywhere else. CAL/XJT have the embroidered wings but to be quite honest they look kind of cheap. I dont have a shirt with it but i am not totally against the idea of wearing them. It just strikes me as odd when i see them. They would be kind of convenient and they are apparently bleach-able when you wash them.
I am indifferent but some people can really get their panties in a wad when it comes to what is or is not the "professional" look. While they aren't the norm at xjt there are a few guys with them.