Being of a certain age my Friday night radio listening used to revolve around the late Tommy Vance's Friday Rock Show, which I'd invariably tape and re-visit during the week, rather like a late 70s/early 80s style podcast. Now I'm listening to Ewan's rock podcasts every Friday on the Podcast Network, Ewan seems to variously title it TPN Rock, or just "The Rock Show". Whatever, it's all good to me.
He's discovering new bands that I've never heard of, which sounds grim at first, but the majority are superb and I've not heard a truly duff one yet. If you're into pretty much any genre of rock music I'd suggest giving Ewan's rock music podcast a few listens.