How do you guys manage to transmit the Wind "numbers" and information other information normally found in the atis, through the feed so that it is able to show up in the Track information on itunes. On feeds like KBOS and KJFK ?

This is on almost all our feeds, at least those directly or loosely associated with an airport. Center feeds aren't associated with airports per se, but we try to list the airport nearest the feed location when possible.
We decode METARs and broadcast them as part of the metadata on the MP3 stream.
-Dave