the droid uses the default notification sound for its on/off sound. Change your default notif ringtone and you should hear whatever that is.
That doesn't seem to be happening with me. I have my default notification ringtone set, and it's what I hear when I receive a text message or a voicemail.
But whenever I turn the phone on or off, I get some annoying beeping sound. I even listened to all the available notification ringtones on my phone, and the beeping sound isn't even one of them.
Edited to add:
I used to hear the "Droid" sound when turning the phone on and off. But ever since I changed my default notification ringtone, I'm getting the beeping instead, when I turn the phone on and off. But my default sound works for everything else.
Edited again to add:
My notification ringtone is actually a custom sound that I put on the SD card. Is this why it isn't working at startup and shutdown - because it hasn't found the SD card yet? Any way around this?