Default BT Stack issues...

Ok so started with nexus one, now with the EVO. I'm thinking its just Android.
Ive got a Pioneer 7100BT in the car. But research shows this to be a widespread issue.
I can pair and all the audio goes through properly. Pandora streams through the car. I can access my phone book, make and receive a call. The only problem is the call audio is always rerouted through the phone....

Any ideas?