From the Pew Internet & American Life Project:
More than 22 million American adults own iPods or MP3 players and 29% of them have downloaded podcasts from the Web so that they could listen to audio files at a time of their choosing. That amounts to more than 6 million adults who have tried this new feature that allows internet “broadcasts” to be downloaded onto their portable listening device.
You can see the entire PDF report here. While the numbers make podcasting look very good, I think they might be slightly high. Considering that iPodder has around 125,000 downloads and there are only 5000 or so podcasts, 6 million listeners seems like a very high number. Or take a look at Podcast Alley – they now have about 300,000 page views a month. Even if they had that amount since podcasting started back in September, they would only have just over 2 million page views.
Read: Podcast Wizard Blog