I have owned the iPhone 3G from launch date until the 3GS was released. On my iPhone 3G I did a lot of texting and the vibrate never seemed to wear down on it. It started out strong and is still strong to this day. With my iPhone 3GS its a different story. The vibrate is very weak and this worries me because I don't think I will be able to feel it in my pocket. I'm wondering if any other iPhone owners are experiencing this. I'm hoping that it is a problem with OS 3.0 and not the new hardware. Let me know what you think!