Podcasts now outnumber radio stations. This isn't really surprising, but I do find it interesting:

There are now more podcasts than there are radio stations worldwide, matching a prediction made on an Irish blog site last year.

In November of last year on his blog Podcasting News Ireland, Brian Greene forecast that, with new podcasts growing by more than 800 per week, they would outnumber radio stations by St Patrick's Day 2006. He said that although podcasts are strictly speaking shows rather than stations, they are independently distributed and subscribed so the comparison holds true to an extent.