You can use any simple phone, mono , bluetooth headset to listen to audio from your Android device. There is this tool that worked well on Windows Mobile , it is called BlueMusic and has been ported to Android OS recently. Music, podcasts and games, actually all sounds can be routed via a bluetooth connection even to a simple phone Headset . This software also supports A2DP, so can be used with stereo headsets as well. It's working close to a bluetooth headset manager, if you want. The software is available on android market, search for BlueMusic, and on developers website :
Teksoft - Future Teknology
A feature that I like most is the ability to redirect the audio after a phone call. As you know, when your headset is connected and you get a phone call, you can take it on the headset, but this would stop your music playback. This software has this option, to redirect the audio over bluetooth after a phone call. I find it very useful, actually it gives me continuous Music support, exactly like it did on my old Windows Mobile phone.
The only limiting factor I could think of, for this not working with your hardware, is your Android's Bluetooth stack, since there were so many complaints on Google's limited bluetooth API. Make sure you test the trial version first, or contact the developer for compatibility questions.