NYC Subway podcasts??

I noticed a poster on the subway today that advertised MTA "TransitTrax" podcasts. What exactly do they podcasts contain you ask? Well for starters, they provide you information about service advisories, MetroCard information, safety tips, etique tips (seriously), news and construction updates. It all seems a bit strange to me, but hey if it works for you go for it! Read more about it at Gizmodo (a personal favorite of mine).