But those don't seem to be amateur podcasts. Text blogs are very popular but the audio versions seemed to have flopped. Maybe it is because people prefer to READ the blogs rather than hear them.
DS:Life, GAFcast, PFT are all amateur podcasts. IGN could be classified as amateur, given that podcasts are an aside to their primary function.
Like I said, the issue with podcasting is that there are so many of them and so few prominent spots on iTunes.