Urban riders listen to music instead of the traffic sounds around them at their own peril, but if you ride somewhere safe like paths or tracks maybe you’ll be interested in the iBikeMount, which lets you attach your iPod Nano to your bike’s handlebars. It’s a little pricey for what it is at $29.99, but you can use it on exercise bikes, baby strollers and even lawnmowers if you want to.