All RNO All the Time!
The RNO has inaugurated an internet radio station where you can hear a continuous feed of RNO recordings.
To listen to the stream, just click over to radio page on the Russian language version of the RNO website (and bookmark it for future reference). There, you can select whether to stream in 128 kpbs or 256 kbps mode (256 being the higher quality, but requiring greater bandwidth).
Titles of the songs show in Russian as they are streaming, making this a great way to improve your Russian language skills as well.