There have been a couple of programs about perfect pitch lately. I listened to one this evening, on The Infinite Mind. This one was okay, but the one I really enjoyed was a few weeks back with Robert Krulwich explaining. It's Radio Lab, produced by WNYC and while poking around at their site I found several great folk programs as well (including Oscar Brand's program). So much of this stuff is available on demand--such riches! Anyway, from season 2, program 202, was "Musical Language." link.

SRS