Just listened into my feed:
American 1044 called declaring a medical emergency for a woman having a baby. Listen into the KBDR/ZBW/NY TRACON feed until 19:53 zulu.
AAL1044 was enroute from TNCA to KBOS in a 757-200 over Long Beach, NY when it declared the emergency.
You can track the flight here:http://www4.fboweb.com/21/track/trackfree2b.asp?flightnum=aal1044
ZBW seems to be re-routing all a/c inbound due to some sort of delay. Listen into the Boston feeds for this emergency