The following websites are locations where you may locate podcasts that you can download and listen to at your leisure. Simply go to the site and click to download the podcasts.  The audio and/or video podcasts will download to iTunes.  You can also search for the podcasts by going to the iTunes store and search the podcast section.   I listen to many of these and find them very helpful for Mac users:

MacBreak Weekly...
Get the latest Mac news and views from the top journalists covering Apple today. This roundtable discussion is audio only.

This Week in Tech (TWIT)...
Get the latest Mac news and views from the top journalists covering Apple today. This roundtable discussion is audio only.
Your first podcast of the week is the last word in tech. Join Leo Laporte, Patrick Norton, John C. Dvorak, and other tech luminaries in a roundtable discussion of the latest trends in high tech. Winner of "People's Choice Podcast" and "Best Technology Podcast" in the 2005 People's Choice Podcast Awards. Released every Sunday at midnight Pacific.

Cranky Geeks...
John C. Dvorak, whose crankiness knows no bounds, is a contributing editor of PC Magazine, for which he has been writing two columns, including the popular Inside Track, since 1986.


The Following Podcasts are found by searching the iTunes store under podcasts:

Apple Quick Tips...
Composed of numerous, short podcasts that help you do everyday tasks with your MAC.

Grammar Girls Quick and Dirty Tips for Better Writing...
Short friendly tips for better writing.

The Princeton Review Vocabulary Minute...
One of my favorite sites.  Vocabulary is reinforced (or introduced) through songs.

NPR: Science Friday...
Weekly news in science, technology, health, and the environment.

60 Second Science...
A daily minute commentary about developments in science.