I’ve gotten in the habit of playing music on my big stereo via iTunes running on my Mac. A handy remote control for this is the Apple-created iPhone app called “Remote”. it looks like an ipod on your phone, but it’s controlling an iTunes running on a Mac over the network. It works well enough, but not perfectly. Lag time between waking up the iPhone and being able to control iTunes is in the neigborhood of 5 seconds, which is an eternity when you’re used to instant digital gratification.