First time user since a few days ago and just signed up for a premium. However, I think I'm not going to renew because Japanesepod101 has no drills that I can see. By drills I mean taking new grammar patterns from a lesson, and giving several audio examples, usually in "speaker A begins speaker B responds" form. All generally the same in length using the same grammar pattern but with variations on content.
Ohio State Language Labs has free online audio that uses this method--it's not that useful if you don't have their textbook, but it's a good example of what I'm talking about. I don't think it would entail that much more work for Japanesepod101, but it would really enhance your offering.
Ohio State Language Lab Japanese audio:http://languagelab.it.ohio-state.edu/index.php?id=1673