Need SCO Enabled
A2DP headset profiles will channel virtually all audio to the selected device, such as S9, T505ROKR or Plantronics 855. In order for a non-A2DP headset to work, SCO (Synchronous Connection-Oriented) needs to be enabled. The LG EnV example has nothing to do with the headset but with the fact that VZNavigator has an SCO audiogate built in to direct signal to non-A2DP profiles. On my Storm, I could force the device into SCO by opening VZNavigator and then opening my other application, such as iHeart Radio. this would send SCO to any headset regardless of profile, such as my Jawbone Prime.
I have searched everywhere I cannot find a software gateway that enables this feature in the Droid. There is an app in the market called Sound Route Switcher that claims to enable this but then blames Android for is application not working with Bluetooth.
If any of you find or develop an SCO solution, please let me know. I am willing to purchase/donate for this solution, as I am addicted to iHeart Radio and Google Navigation.