This free software will let you save any YouTube video to your iTunes/iPod.  Simply paste in the URL of the video and iTube does the rest.  Thank you Mr. Benjamin Strahs!

iTube

Update:  It occurred to me after I posted this that some of you might not be familiar with YouTube.   According to a July 16 announcement, 100 million video clips are viewed daily on YouTube, with an additional 65,000 new videos uploaded per 24 hours. The site has almost 20 million visitors each month, according to Nielsen/NetRatings.  YouTube is an example of how the internet is nibbling away at the fabric of popular media, including traditional forms of video delivery such as television and DVD formats.