There is certainly some benefit to encrypting removable flash. However, for non-removable flash, the speed at which normal attackers could pull items off of int

There is certainly some benefit to encrypting removable flash. However, for non-removable flash, the speed at which normal attackers could pull items off of internal flash without the device running should be relatively long. I'm not totally sure what the limitations are with adb but if it's using Honeycomb style encryption, if you have permission to read the file it's going to be automatically decrypted.