Last month we told you about the Immersion MOTIV platform, which would allow developers to have much more control over the way phones use haptic feedback (the way your phone vibrates). Up to this point, Android haptic feedback has been a very cut and dry affair: it turns on, it turns off, sometimes it's on a little longer, and sometimes it isn't. Immersion, the SDK of which is now available, gives devs the tools to make this a much more varied experience.
Say you are playing a console video game like Uncharted 2 on the PS3. Your controller will vibrate in response to what is going on around you.