Just heard from MacNN that Paul McCartney is on the iTunes Ad, so I went to Apple.com to download it straight away. The ad was ok, but I personally prefer the other ones. I really like the idea in the iPod Shuffle 2nd ad where they change their clothes all the time, that was something really creative!
Paul’s ad seems to have more meaning to it then just a 30 second short film, read more if you are interested: http://www.macnn.com/articles/07/06/15/itunes.ad.with.mccartney/
So if you are a fan of Paul or if you just want to download the ad to see what its like, here is the link: http://images.apple.com/movies/us/apple/ipoditunes/home/2007/ipod_itunes-mandolin_560x332.mov
P.S. How do you download it? I have always used Flashget, so I just view the source of the webpage, grab the link that says something.mov and paste it in Flashget.
Flashget Official Website: http://www.flashget.com/index_en.htm