A number of races used to nominally ban running with music but few if any bothered to enforce this in any meaningful way. How could they? Picture the Chicago Marathon with 45,000. The elite runner don't use them and the hackers (myself included) are far too numerous to do anything about it. As a result, most of the races have backed away from unenforceable bans and adopted a sensible " Run with Care and Be Aware of Your Surroundings" policy.
First, the legal realist in me applauds the eventual merging of the law on the books with the law in action.
Second, I am interested in what my fellow bloggers do on training runs and in races. I do run with an iPod almost always when I am running by myself. Not today though, because its my final 5K before the Chicago half and I want to focus on a gorgeous fall like day and my mechanics. But normally if I don't have the pleasure of good company, I prefer to drift away to various tunes and podcasts as the miles go by.
Next time, what I listen to. You'd be surprised.