I'm wondering whether you ever saw this:

Originally Posted By: artie505
Originally Posted By: kevs
Joe, did not work, I bought it and returned it all today. The guys at the apple store said you need to be in itunes. I was just hoping to hear music/ sounds of of any random website through my stereo speakers. No problem, worth a try.

I think Airfoil - Send audio from any app to AirPort Express/Apple TV and more may be what you're looking for, but you'll need the stuff you returned to turn the trick.

It only costs $25, and it will do precisely what you're looking for, i.e. send music from your browser to your AirPort Express Base Station.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire