Interesting, Good
I just noticed that with the iPhone 3G (and the 2.0 firmware, in general, I guess?), the iPod application doesn't time out and become unresponsive to the headset clicker. It always annoyed me before, when I paused it with the headset button, if I waited too long, I wouldn't be able to restart the music with another click. I could hear a brief static, as the iPod app went to bed. Now, even after that static - about 15 minutes, maybe - a single click of the headset button brings it back.