I’m not sure exactly what podcasting is what it seems to be a taping of the show put on the internet for download. Are there any that are free? does the local radio station put it on or does the radio show do it directly?

i have a 5 years old toshiba satellite laptop 4giga memory, and would like to install itunes for upload podcasting, but the version i found on apple.com is not compatible
can you help me?
thank you!

I have recently been assigned to work on the website portion of the Media Ministry at my church. As part of our website we produce a weekly podcast. Right now each episode consists of the sermon from the Sunday morning service. We would like some unbiased opinions about how we can make our podcast and website better so that we can do our part in spreading the gospel. We would like comments and suggestions our sound quality and site design. All comments are welcome, but we would especailly like to hear from those who have experience producing church websites and podcasts.
Our podcast URL is

http//www.waymanchapelame.org/podcasting

Our RSS feed is

http://feeds.feedburner.com/TheWaymanChapelAmeChurchPodcast