Late season joggers will find this idea to be an instant hit.  While it’ll be 78 degrees and sunny in Chicago this Sunday for the Chicago Marathon, the forecast beyond that is not looking so pleasant.  Nike has released their Nike Performance HatPhone for just such weather.  The HatPhone is a pair of headphones weaved into a cold weather skull cap.  Toss it on your head, plug it into your iPod and you’re on your way.  [$55 at Nike]