I have entered a contest to win a One Good Earbud. These are especially good for runners, cyclists, etc because they allow you to get the full listening experience of your music, podcasts, radio, etc while still being able to hear traffic and other possible hazards.
The contest can be found on a fellow blogger's blog: Here. This blogger is Kyle Kranz, a recent SDSU graduate and ultrarunner/minimalist dude. He offers some interesting insights on these topics and others.
Read his blog for details on how to enter the contest!
If you don't win and still want to purchase one, here is a link: