I just read this and thought I'd share it here
http://hub.aa.com/en/nr/american-air...el-even-easier
"American Airlines is partnering with Uber to create a door-to-door streamlined service to help customers get from home or work to the airport
and back."
Perhaps this is the beginning of the Uber/PHL relationship we've all been waiting for.
You have always been able to get an Uber black car from PHL. These cars are essentially licensed limo drivers. It is the cheaper Uber X rides that are not available from the airport.