This site has a number of desktop pictures that resemble the iPod advertisements.
For example a picture of Bugs Bunny blacked out while wearing an iPod just like the ads but its caption is “Perfect for the underground scene.”
Another is of Fred Flintstone and reads”Stone age technology.”
Another is of Calvin & Hobbes and says “Jam to music with your best friend.” (Really miss C&H)
There are several others, see them here.
