A couple of weeks ago, Jim Cosco wrote a great post about how to make your podcast a success. We produce a podcast every week (well almost every week), and we’re really proud about the audience we’ve built. Within three months we hit the 20K downloads marker, and we’re chipping away at the next 20 thousand. But how do you know if your podcast is really successful? How do you measure its reach? What can you infer from the stats you’re collecting?