I’m subscribed to NHK News podcasts, which are of a decent length, spoken in a very clear manner, and free. I’m also nowhere near the level of understanding, but I’ve found that of all the Japanese podcasts I’m subscribed to, I can pick up the most from these (read: still not a lot, but at times enough to tell what’s being spoken about anyway). I just leave it running while at work.
I’ve been downloading them off of iTunes Japan. There’s a ton of really good free ones there (I’ve actually not encountered a pay one yet). Don’t know if you have an iTunes Japan account, but I don’t think you can find the NHK one anywhere else.