JohnK,

Here is Rachmaninoff himself playing the first movement (Moderato) from his second piano concerto. It was recorded in 1929 by RCA victor with Rachmaninoff's favorite orchestra; the Philadelphia Orchestra. Leopold Stokowski is conducting.

http://www.youtube.com/watch?v=x8l37utZxMQ

I think John just got wood...

My idol!!

there is some video footage of him also on youtube, but audio is rare to find. One video has short clip of him playing around friends, and he says something at the end, however, back then they had not yet created the recording equipment for audio.