I've been using Bluetooth earbuds that I use in the gym, the Jaybird Bluebuds X. They could kinda work on the road, but I saw a review of the new wireless Beats that claimed they let in more outside sound on purpose. I know that in general, earbuds and riding aren't the best idea but music through the phone speaker isn't working well. However, having music really helps me ride harder.
So, if you wear earbuds of some sort while riding, especially Bluetooth ones, let me know which ones.