I am trying to find a program that plays .AU sound files on my Curve. I have new VOIP service and it email's me my voice messages in that format.

Does anyone know of a program that does that?

Thanks in advance for all your help and have a great day.

I don't think .au is a standard audio file type, like .wav or .mp3. Sounds like it may be some proprietary format.
If so, then it's unlikely that it will ever play on the device.

It is not a standard format. I did a search and this is the description I found:

Audio file typically created on a Sun Microsystems or Unix-based machine; comprised of three parts: a header (containing 24 bytes), an annotation block (variable length), and the actual audio data.

Aren't .au files the old Sun OS audio format?
As for playing them on a BB, I don't know of anything