Inspired by a recent magazine cover, this commentary appeared in The Clog, the staff blog of Philadelphia's (the city) citypaper.net.
The Philadelphia Trumpet, as Jon points out, has nothing to do with the city or a sexual position (we were disappointed too!). It's actually the monthly publication associated with the Philadelphia Church of God, based in Edmond, OK (get the skinny on them here). While it should be assumed the name derives from the fact that being a Philadelphian is next to godilness, they actually got it from a church in the book of Revelation. It was never mentioned in the 2005 miniseries starring Bill Pullman, so I can't confirm the truth in that statement. Still, had the Trumpet seen Live Free or Die Hard, they would know that we are all in fact vulnerable to cyberterrorism, and only John McClane can save us.
A Philadelphia trumpet position? Uh... will any of us ever be able to think of Gerry's rag in the same way again?