"BlogMatrix Sparks! 2.0 brings podcasting to the next level by integrating recording, sharing and listening all into one offering.
Sparks! is also a full-fledged weblog reader, RSS aggregator and streaming Internet radio recorder all in one."
Sparks! 2.0 lets you:
-easily record and publish podcasts
-read and download your favorite podcasts
-record (live or scheduled) streaming Internet radio stations as MP3s
-use it as a weblog reader
-monitor and control your downloads
Though it's not free. It's official main page is here.
update: new podcast article from CNN:
CNN: Tuning in to new radio trend
-Pew Internet: "More than 22 million American adults own iPods or MP3 players and 29% of them have downloaded podcasts..."
-Paris Hilton is going to be doing a podcast.