The feature I want

So I was driving in the car this morning listening to a Podcast with no safe way to write down a URL or name of something that I want and I realized that my Ipod or another MP3 device needs a way to do bookmarking. I should be able to press a button and put a bookmark on a podcast, audio book or even a song and then go back to those later on the device and on my PC. This would be very easy, now how do I tell Mac?