The freakin' bonger !
I've had a listen to the ATC recording (from skidbuggy's link), as well as a few others over time - Sully's Hudson River landing, the Thompson 767 bird ingestion video on Youtube, etc. I know you'd expect it, but nevertheless it's very comforting to see how hard the controllers try to help a plane in trouble.
Now, an SLF question that may be a bit off-topic.. In the background of the UA497 transmissions I could hear the alarm bonger sounding continually. I can imagine the tremendous pressure that a cockpit crew would be under in an emergency, and having that damn thing beeping away would drive up my stress level to breaking point. Is there any way to permanently silence that ? I'd take to it with the fire axe as the first thing on *my* checklist.