Android phones, apps and tablets

Amazon mp3 isn't a service to my knowledge so it should never run unless you open it. It's also a market app so should be uninstallable. Voice Search (Google's) is a market install so it should be removable.

Which phone do you have? DHD has Amazon MP3 pre-installed so you'd need to root it.

Menu > Settings > Application Settings > Manage applications and see if you can kill it and uninstall it from there.

Dell Streak. Been through every menu, downloaded additional deletion apps and still the bastard things keep opening. I have opened them before to see what they did, but never used either. Don't remember installing them and not sure if they were part of the last software upgrade as I had the phone for a day before upgrading.
I only have options to force close. Uninstall is greyed out. Seems to open voice search and or voice dialler when I make a call and amazon mp3 when I use kindle or any google apps and occasionally internet via wifi. Only started last month, which makes me think it's an upgrade applied to a google app. Sneaky