Podcasting makes any topic on the planet viable to deliver. MSM talks about 100 different popular topics in 4,000 ways. If you like those 100 topics then stick with MSM. If you're looking for something different - head on over to podcasting.
Glenn (preumably) over on Glenn Audio is a listener that has missed the point of podcasting:
Sorry, Glenn - podcasting isn't supposed to be the radio of the future. I can see why you're disappointed if that's the impression you were under. I'm also unclear why Glenn thinks that the differentiating factor is pre-production? I've found that post-production is much more important to quality. Get rid of the gaffs, the bumps, the sniggers, and whatever else is detracting from the content.
Podcasters should be aware that there's an inverse relationship between show content and quality. The general rule is that the closer your content is to MSM content, the higher quality your show has to be. If you're way off in the weeds doing a show on knitting with a single needle while blindfolded, then your audience is so happy to have found a like-minded individual that they'll be less picky about your quality. When you podcast about topics that are already widely available in MSM, then you're setting yourself up for some serious competition.