The Audionow.com website describes what it does this way: "The company's proprietary protected technology is the product of years of research and design. Our systems convert virtually any audio format available on the Internet and streams that connect to the AudioNow gateway server which then relays that stream to any phone listener."
You must register for the service and the company will ask for your name, phone number, email, and cell phone provider. You'll also have to agree to the terms of service. I read through the terms of service and they appear to be fairly straight-forward. Let me know if it works for you.