Well it sounds like at this point an apology is the best I can offer, as what is done is done -- Sorry! If you or anyone on your team is ever in Boston I'll gladly buy you a beer!
I'll be looking into it -- if it is copyright infringement I believe this is fair use (parody, non-profit, academic, etc.). If it isn't fair use than this is actually a really interesting part of copyright law (e.g. using a premium font will make it more difficult for others to perform satire on your work).