If Android is the say way as Winmo was (had an HTC winmo and a palm winmo device prior to my Droid) in regards to the way BT audio works, it's NOT a downfall or fault of Android, but a fault of the ear piece manufacturers. For YEARS (4+) Winmo has been Stereo voice dial activation (from what was explained to me). Android may have gone the same way. Why Jawbone/etc.'s manufacturers have not gotten with the program, I will never understand. THEIR job is to make devices to suit all handsets NOT the other way around.
I guess what I'm saying is PLEASE stop bashing Android/etc for manufacturing deficits of these accessory devices! Boo on Jawbone for not including this capability in their products!
WinMo does not work the same as Android, so i really don't see your point here. BT Voice Dialing is not enabled in Android. Period. And the Source Code for Voice Dialing is quite bare and buggy. It has been "enabled" with varying results via Adrynalyne (a dev here), but it breaks other things and is not 100% stable. I'm not bashing Android. it's by far my favorite mobile OS, and i'm truly excited about its future. However, one shortcoming is the lack of BT VD.