heh =) I can do an option to disable status bar notification, if you could be more polite ))
generally using accelerometer drains battery. So the user must now about this service being active. There is no battery-safe method to detect all supported players to be paused or playing, so automatic enabling-disabling is generally impossible.
Status bar notification option can be added still. Is it really needed after the fact mentioned above? I think you'll later cry "I'm sick and tired of this app! It drains battery even when I'm not listening to the music at all. Uninstalled. Get rid of that ASAP bla bla bla"