[CMeys]

I actually found the answer to my question in another thread here (the one about announcement over BT) which suggested to make this reg edit:

Change
HKCU\ControlPanel\Sounds\TTSAnnounce\Category
from VoiceCommand1 to Ring

With that I've got announcements over the device speaker (not over BT though, I don't think that will possible until we get WM6.5 for the TP2 from what I've seen posted).